Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / WinForms / Managed / System / WinForms / SystemInformation.cs / 1 / SystemInformation.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
/*
*/
namespace System.Windows.Forms {
using System.Text;
using System.Configuration.Assemblies;
using System.Threading;
using System.Runtime.Remoting;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System;
using Microsoft.Win32;
using System.IO;
using System.Security;
using System.Security.Permissions;
using System.Drawing;
using System.ComponentModel;
///
/// Provides information about the operating system.
///
public class SystemInformation {
// private constructor to prevent creation
//
private SystemInformation() {
}
// Figure out if all the multimon stuff is supported on the OS
//
private static bool checkMultiMonitorSupport = false;
private static bool multiMonitorSupport = false;
private static bool checkNativeMouseWheelSupport = false;
private static bool nativeMouseWheelSupport = true;
private static bool highContrast = false;
private static bool systemEventsAttached = false;
private static bool systemEventsDirty = true;
private static IntPtr processWinStation = IntPtr.Zero;
private static bool isUserInteractive = false;
private static PowerStatus powerStatus = null;
private const int DefaultMouseWheelScrollLines = 3;
////////////////////////////////////////////////////////////////////////////
// SystemParametersInfo
//
///
///
/// Gets a value indicating whether the user has enabled full window drag.
///
///
public static bool DragFullWindows {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETDRAGFULLWINDOWS, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Gets a value indicating whether the user has selected to run in high contrast
/// mode.
///
///
public static bool HighContrast {
get {
EnsureSystemEvents();
if (systemEventsDirty) {
NativeMethods.HIGHCONTRAST_I data = new NativeMethods.HIGHCONTRAST_I();
data.cbSize = Marshal.SizeOf(data);
data.dwFlags = 0;
data.lpszDefaultScheme = IntPtr.Zero;
bool b = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETHIGHCONTRAST, data.cbSize, ref data, 0);
// NT4 does not support this parameter, so we always force
// it to false if we fail to get the parameter.
//
if (b) {
highContrast = (data.dwFlags & NativeMethods.HCF_HIGHCONTRASTON) != 0;
}
else {
highContrast = false;
}
systemEventsDirty = false;
}
return highContrast;
}
}
///
///
/// Gets the number of lines to scroll when the mouse wheel is rotated.
///
///
public static int MouseWheelScrollLines {
get {
if (NativeMouseWheelSupport) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETWHEELSCROLLLINES, 0, ref data, 0);
return data;
}
else {
IntPtr hWndMouseWheel = IntPtr.Zero;
// Check for the MouseZ "service". This is a little app that generated the
// MSH_MOUSEWHEEL messages by monitoring the hardware. If this app isn't
// found, then there is no support for MouseWheels on the system.
//
hWndMouseWheel = UnsafeNativeMethods.FindWindow(NativeMethods.MOUSEZ_CLASSNAME, NativeMethods.MOUSEZ_TITLE);
if (hWndMouseWheel != IntPtr.Zero) {
// Register the MSH_SCROLL_LINES message...
//
int message = SafeNativeMethods.RegisterWindowMessage(NativeMethods.MSH_SCROLL_LINES);
int lines = (int)UnsafeNativeMethods.SendMessage(new HandleRef(null, hWndMouseWheel), message, 0, 0);
// this fails under terminal server, so we default to 3, which is the windows
// default. Nobody seems to pay attention to this value anyways...
if (lines != 0) {
return lines;
}
}
}
return DefaultMouseWheelScrollLines;
}
}
////////////////////////////////////////////////////////////////////////////
// SystemMetrics
//
///
///
/// Gets the dimensions of the primary display monitor in pixels.
///
///
public static Size PrimaryMonitorSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXSCREEN),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYSCREEN));
}
}
///
///
/// Gets the width of the vertical scroll bar in pixels.
///
///
public static int VerticalScrollBarWidth {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXVSCROLL);
}
}
///
///
/// Gets the height of the horizontal scroll bar in pixels.
///
///
public static int HorizontalScrollBarHeight {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYHSCROLL);
}
}
///
///
/// Gets the height of the normal caption area of a window in pixels.
///
///
public static int CaptionHeight {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYCAPTION);
}
}
///
///
/// Gets the width and
/// height of a window border in pixels.
///
///
public static Size BorderSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXBORDER),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYBORDER));
}
}
///
///
/// Gets the thickness in pixels, of the border for a window that has a caption
/// and is not resizable.
///
///
public static Size FixedFrameBorderSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXFIXEDFRAME),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYFIXEDFRAME));
}
}
///
/// Gets the height of the scroll box in a vertical scroll bar in pixels.
///
public static int VerticalScrollBarThumbHeight {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYVTHUMB);
}
}
///
/// Gets the width of the scroll box in a horizontal scroll bar in pixels.
///
public static int HorizontalScrollBarThumbWidth {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXHTHUMB);
}
}
/*
///
///
/// Gets the default dimensions of an icon in pixels.
///
///
public static Size IconSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXICON),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYICON));
}
}
///
///
/// Gets the dimensions of a cursor in pixels.
///
///
public static Size CursorSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXCURSOR),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYCURSOR));
}
}
///
///
/// Gets the system's font for menus.
///
///
public static Font MenuFont {
get {
Font menuFont = null;
//we can get the system's menu font through the NONCLIENTMETRICS structure via SystemParametersInfo
//
NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS();
bool result = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0);
if (result && data.lfMenuFont != null) {
// SECREVIEW : This assert is safe since we created the NONCLIENTMETRICS struct.
//
IntSecurity.ObjectFromWin32Handle.Assert();
try {
menuFont = Font.FromLogFont(data.lfMenuFont);
}
catch {
// menu font is not true type. Default to standard control font.
//
menuFont = Control.DefaultFont;
}
finally {
CodeAccessPermission.RevertAssert();
}
}
return menuFont;
}
}
///
///
/// Gets the height of a one line of a menu in pixels.
///
///
public static int MenuHeight {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMENU);
}
}
///
///
/// Returns the current system power status.
///
///
public static PowerStatus PowerStatus
{
get
{
if (powerStatus == null) {
powerStatus = new PowerStatus();
}
return powerStatus;
}
}
///
///
/// Gets the size of the working area in pixels.
///
///
public static Rectangle WorkingArea {
get {
NativeMethods.RECT rc = new NativeMethods.RECT();
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETWORKAREA, 0, ref rc, 0);
return Rectangle.FromLTRB(rc.left, rc.top, rc.right, rc.bottom);
}
}
///
///
/// Gets
/// the height, in pixels, of the Kanji window at the bottom
/// of the screen for double-byte (DBCS) character set versions of Windows.
///
///
public static int KanjiWindowHeight {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYKANJIWINDOW);
}
}
///
///
/// Gets a value indicating whether the system has a mouse installed.
///
///
[EditorBrowsable(EditorBrowsableState.Never)]
public static bool MousePresent {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_MOUSEPRESENT) != 0;
}
}
///
///
/// Gets the height in pixels, of the arrow bitmap on the vertical scroll bar.
///
///
public static int VerticalScrollBarArrowHeight {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYVSCROLL);
}
}
///
///
/// Gets the width, in pixels, of the arrow bitmap on the horizontal scrollbar.
///
///
public static int HorizontalScrollBarArrowWidth {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXHSCROLL);
}
}
///
///
/// Gets a value indicating whether this is a debug version of the operating
/// system.
///
///
public static bool DebugOS {
get {
Debug.WriteLineIf(IntSecurity.SecurityDemand.TraceVerbose, "SensitiveSystemInformation Demanded");
IntSecurity.SensitiveSystemInformation.Demand();
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_DEBUG) != 0;
}
}
///
///
/// Gets a value indicating whether the functions of the left and right mouse
/// buttons have been swapped.
///
///
public static bool MouseButtonsSwapped {
get {
return(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_SWAPBUTTON) != 0);
}
}
///
///
/// Gets the minimum allowable dimensions of a window in pixels.
///
///
public static Size MinimumWindowSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMIN),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMIN));
}
}
///
///
/// Gets the dimensions in pixels, of a caption bar or title bar
/// button.
///
///
public static Size CaptionButtonSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXSIZE),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYSIZE));
}
}
///
///
/// Gets the thickness in pixels, of the border for a window that can be resized.
///
///
public static Size FrameBorderSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXFRAME),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYFRAME));
}
}
///
///
/// Gets the system's default
/// minimum tracking dimensions of a window in pixels.
///
///
public static Size MinWindowTrackSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMINTRACK),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMINTRACK));
}
}
///
///
/// Gets the dimensions in pixels, of the area that the user must click within
/// for the system to consider the two clicks a double-click. The rectangle is
/// centered around the first click.
///
///
public static Size DoubleClickSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXDOUBLECLK),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYDOUBLECLK));
}
}
///
///
/// Gets the maximum number of milliseconds allowed between mouse clicks for a
/// double-click.
///
///
public static int DoubleClickTime {
get {
return SafeNativeMethods.GetDoubleClickTime();
}
}
///
///
/// Gets
/// the dimensions in pixels, of the grid used
/// to arrange icons in a large icon view.
///
///
public static Size IconSpacingSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXICONSPACING),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYICONSPACING));
}
}
///
///
/// Gets a value indicating whether drop down menus should be right-aligned with
/// the corresponding menu bar item.
///
///
public static bool RightAlignedMenus {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_MENUDROPALIGNMENT) != 0;
}
}
///
///
/// Gets a value indicating whether the Microsoft Windows for Pen computing
/// extensions are installed.
///
///
public static bool PenWindows {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_PENWINDOWS) != 0;
}
}
///
///
/// Gets a value indicating whether the operating system is capable of handling
/// double-byte (DBCS) characters.
///
///
public static bool DbcsEnabled {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_DBCSENABLED) != 0;
}
}
///
///
/// Gets the number of buttons on mouse.
///
///
public static int MouseButtons {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CMOUSEBUTTONS);
}
}
///
///
/// Gets a value indicating whether security is present on this operating system.
///
///
public static bool Secure {
get {
Debug.WriteLineIf(IntSecurity.SecurityDemand.TraceVerbose, "SensitiveSystemInformation Demanded");
IntSecurity.SensitiveSystemInformation.Demand();
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_SECURE) != 0;
}
}
///
///
/// Gets the dimensions in pixels, of a 3-D
/// border.
///
///
public static Size Border3DSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXEDGE),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYEDGE));
}
}
///
/// Gets the dimensions
/// in pixels, of
/// the grid into which minimized windows will be placed.
///
public static Size MinimizedWindowSpacingSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMINSPACING),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMINSPACING));
}
}
///
///
/// Gets
/// the recommended dimensions of a small icon in pixels.
///
///
public static Size SmallIconSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXSMICON),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYSMICON));
}
}
///
///
/// Gets the height of
/// a small caption in pixels.
///
///
public static int ToolWindowCaptionHeight {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYSMCAPTION);
}
}
///
///
/// Gets the
/// dimensions of small caption buttons in pixels.
///
///
public static Size ToolWindowCaptionButtonSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXSMSIZE),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYSMSIZE));
}
}
///
///
/// Gets
/// the dimensions in pixels, of menu bar buttons.
///
///
public static Size MenuButtonSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMENUSIZE),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMENUSIZE));
}
}
///
/// Gets flags specifying how the system arranges minimized windows.
///
public static ArrangeStartingPosition ArrangeStartingPosition {
get {
ArrangeStartingPosition mask = ArrangeStartingPosition.BottomLeft | ArrangeStartingPosition.BottomRight | ArrangeStartingPosition.Hide | ArrangeStartingPosition.TopLeft | ArrangeStartingPosition.TopRight;
int compoundValue = UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_ARRANGE);
return mask & (ArrangeStartingPosition) compoundValue;
}
}
///
///
/// Gets flags specifying how the system arranges minimized windows.
///
///
public static ArrangeDirection ArrangeDirection {
get {
ArrangeDirection mask = ArrangeDirection.Down | ArrangeDirection.Left | ArrangeDirection.Right | ArrangeDirection.Up;
int compoundValue = UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_ARRANGE);
return mask & (ArrangeDirection) compoundValue;
}
}
///
///
/// Gets the dimensions in pixels, of a normal minimized window.
///
///
public static Size MinimizedWindowSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMINIMIZED),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMINIMIZED));
}
}
///
///
/// Gets the default maximum dimensions in pixels, of a
/// window that has a caption and sizing borders.
///
///
public static Size MaxWindowTrackSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMAXTRACK),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMAXTRACK));
}
}
///
///
/// Gets the default dimensions, in pixels, of a maximized top-left window on the
/// primary monitor.
///
///
public static Size PrimaryMonitorMaximizedWindowSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMAXIMIZED),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMAXIMIZED));
}
}
///
///
/// Gets a value indicating whether this computer is connected to a network.
///
///
public static bool Network {
get {
return(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_NETWORK) & 0x00000001) != 0;
}
}
///
///
/// To be supplied.
///
///
public static bool TerminalServerSession {
get {
return(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_REMOTESESSION) & 0x00000001) != 0;
}
}
///
///
/// Gets a value that specifies how the system was started.
///
///
public static BootMode BootMode {
get {
Debug.WriteLineIf(IntSecurity.SecurityDemand.TraceVerbose, "SensitiveSystemInformation Demanded");
IntSecurity.SensitiveSystemInformation.Demand();
return(BootMode) UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CLEANBOOT);
}
}
///
///
/// Gets the dimensions in pixels, of the rectangle that a drag operation
/// must extend to be considered a drag. The rectangle is centered on a drag
/// point.
///
///
public static Size DragSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXDRAG),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYDRAG));
}
}
///
///
/// Gets a value indicating whether the user requires an application to present
/// information visually in situations where it would otherwise present the
/// information in audible form.
///
///
public static bool ShowSounds {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_SHOWSOUNDS) != 0;
}
}
///
///
/// Gets the
/// dimensions of the default size of a menu checkmark in pixels.
///
///
public static Size MenuCheckSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMENUCHECK),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMENUCHECK));
}
}
///
///
/// Gets a value
/// indicating whether the system is enabled for Hebrew and Arabic languages.
///
///
public static bool MidEastEnabled {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_MIDEASTENABLED) != 0;
}
}
private static bool MultiMonitorSupport {
get {
if (!checkMultiMonitorSupport) {
multiMonitorSupport = (UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CMONITORS) != 0);
checkMultiMonitorSupport = true;
}
return multiMonitorSupport;
}
}
///
///
/// Gets a value indicating whether the system natively supports the mouse wheel
/// in newer mice.
///
///
public static bool NativeMouseWheelSupport {
get {
if (!checkNativeMouseWheelSupport) {
nativeMouseWheelSupport = (UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_MOUSEWHEELPRESENT) != 0);
checkNativeMouseWheelSupport = true;
}
return nativeMouseWheelSupport;
}
}
///
///
/// Gets a value indicating whether there is a mouse with a mouse wheel
/// installed on this machine.
///
///
public static bool MouseWheelPresent {
get {
bool mouseWheelPresent = false;
if (!NativeMouseWheelSupport) {
IntPtr hWndMouseWheel = IntPtr.Zero;
// Check for the MouseZ "service". This is a little app that generated the
// MSH_MOUSEWHEEL messages by monitoring the hardware. If this app isn't
// found, then there is no support for MouseWheels on the system.
//
hWndMouseWheel = UnsafeNativeMethods.FindWindow(NativeMethods.MOUSEZ_CLASSNAME, NativeMethods.MOUSEZ_TITLE);
if (hWndMouseWheel != IntPtr.Zero) {
mouseWheelPresent = true;
}
}
else {
mouseWheelPresent = (UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_MOUSEWHEELPRESENT) != 0);
}
return mouseWheelPresent;
}
}
///
///
/// Gets the
/// bounds of the virtual screen.
///
///
public static Rectangle VirtualScreen {
get {
if (MultiMonitorSupport) {
return new Rectangle(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_XVIRTUALSCREEN),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_YVIRTUALSCREEN),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXVIRTUALSCREEN),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYVIRTUALSCREEN));
}
else {
Size size = PrimaryMonitorSize;
return new Rectangle(0, 0, size.Width, size.Height);
}
}
}
///
///
/// Gets the number of display monitors on the desktop.
///
///
public static int MonitorCount {
get {
if (MultiMonitorSupport) {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CMONITORS);
}
else {
return 1;
}
}
}
///
///
/// Gets a value indicating whether all the display monitors have the
/// same color format.
///
///
public static bool MonitorsSameDisplayFormat {
get {
if (MultiMonitorSupport) {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_SAMEDISPLAYFORMAT) != 0;
}
else {
return true;
}
}
}
////////////////////////////////////////////////////////////////////////////
// Misc
//
///
///
/// Gets the computer name of the current system.
///
///
public static string ComputerName {
get {
Debug.WriteLineIf(IntSecurity.SecurityDemand.TraceVerbose, "SensitiveSystemInformation Demanded");
IntSecurity.SensitiveSystemInformation.Demand();
StringBuilder sb = new StringBuilder(256);
UnsafeNativeMethods.GetComputerName(sb, new int[] {sb.Capacity});
return sb.ToString();
}
}
///
/// Gets the user's domain name.
///
public static string UserDomainName {
get {
return Environment.UserDomainName;
}
}
///
///
/// Gets a value indicating whether the current process is running in user
/// interactive mode.
///
///
public static bool UserInteractive {
get {
if (Environment.OSVersion.Platform == System.PlatformID.Win32NT) {
IntPtr hwinsta = IntPtr.Zero;
hwinsta = UnsafeNativeMethods.GetProcessWindowStation();
if (hwinsta != IntPtr.Zero && processWinStation != hwinsta) {
isUserInteractive = true;
int lengthNeeded = 0;
NativeMethods.USEROBJECTFLAGS flags = new NativeMethods.USEROBJECTFLAGS();
if (UnsafeNativeMethods.GetUserObjectInformation(new HandleRef(null, hwinsta), NativeMethods.UOI_FLAGS, flags, Marshal.SizeOf(flags), ref lengthNeeded)) {
if ((flags.dwFlags & NativeMethods.WSF_VISIBLE) == 0) {
isUserInteractive = false;
}
}
processWinStation = hwinsta;
}
}
else {
isUserInteractive = true;
}
return isUserInteractive;
}
}
///
///
/// Gets the user name for the current thread, that is, the name of the
/// user currently logged onto the system.
///
///
public static string UserName {
get {
Debug.WriteLineIf(IntSecurity.SecurityDemand.TraceVerbose, "SensitiveSystemInformation Demanded");
IntSecurity.SensitiveSystemInformation.Demand();
StringBuilder sb = new StringBuilder(256);
UnsafeNativeMethods.GetUserName(sb, new int[] {sb.Capacity});
return sb.ToString();
}
}
private static void EnsureSystemEvents() {
if (!systemEventsAttached) {
SystemEvents.UserPreferenceChanged += new UserPreferenceChangedEventHandler(SystemInformation.OnUserPreferenceChanged);
systemEventsAttached = true;
}
}
private static void OnUserPreferenceChanged(object sender, UserPreferenceChangedEventArgs pref) {
systemEventsDirty = true;
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////
// NEW ADDITIONS FOR WHIDBEY //
//////////////////////////////////////////////////////////////////////////////////////////////////////////
///
///
/// Gets a value indicating whether the drop shadow effect in enabled. Defaults to false
/// downlevel.
///
///
public static bool IsDropShadowEnabled {
get {
if (OSFeature.Feature.OnXp) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETDROPSHADOW, 0, ref data, 0);
return data != 0;
}
return false;
}
}
///
///
/// Gets a value indicating whether the native user menus have a flat menu appearance. Defaults to false
/// downlevel.
///
///
public static bool IsFlatMenuEnabled {
get {
if (OSFeature.Feature.OnXp) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETFLATMENU, 0, ref data, 0);
return data != 0;
}
return false;
}
}
///
///
/// Gets a value indicating whether the Font Smoothing OSFeature.Feature is enabled.
///
///
public static bool IsFontSmoothingEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETFONTSMOOTHING, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Returns a contrast value that is ClearType smoothing.
///
///
public static int FontSmoothingContrast {
get {
if (OSFeature.Feature.OnXp) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETFONTSMOOTHINGCONTRAST, 0, ref data, 0);
return data;
}
else {
throw new NotSupportedException(SR.GetString(SR.SystemInformationFeatureNotSupported));
}
}
}
///
///
/// Returns a type of Font smoothing.
///
///
public static int FontSmoothingType {
get {
if (OSFeature.Feature.OnXp) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETFONTSMOOTHINGTYPE, 0, ref data, 0);
return data;
}
else {
throw new NotSupportedException(SR.GetString(SR.SystemInformationFeatureNotSupported));
}
}
}
///
///
/// Retrieves the width in pixels of an icon cell.
///
///
public static int IconHorizontalSpacing {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_ICONHORIZONTALSPACING, 0, ref data, 0);
return data;
}
}
///
///
/// Retrieves the height in pixels of an icon cell.
///
///
public static int IconVerticalSpacing {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_ICONVERTICALSPACING, 0, ref data, 0);
return data;
}
}
///
///
/// Gets a value indicating whether the Icon title wrapping is enabled.
///
///
public static bool IsIconTitleWrappingEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETICONTITLEWRAP, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Gets a value indicating whether the menu access keys are always underlined.
///
///
public static bool MenuAccessKeysUnderlined {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETKEYBOARDCUES, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Retrieves the Keyboard repeat delay setting, which is a value in the
/// range from 0 through 3. The Actual Delay Associated with each value may vary depending on the
/// hardware.
///
///
public static int KeyboardDelay {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETKEYBOARDDELAY, 0, ref data, 0);
return data;
}
}
///
///
/// Gets a value indicating whether the user relies on Keyboard instead of mouse and wants
/// applications to display keyboard interfaces that would be otherwise hidden.
///
///
public static bool IsKeyboardPreferred {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETKEYBOARDPREF, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Retrieves the Keyboard repeat speed setting, which is a value in the
/// range from 0 through 31. The actual rate may vary depending on the
/// hardware.
///
///
public static int KeyboardSpeed {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETKEYBOARDSPEED, 0, ref data, 0);
return data;
}
}
///
///
/// Gets the Size in pixels of the rectangle within which the mouse pointer has to stay.
///
///
public static Size MouseHoverSize {
get {
int height = 0;
int width = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMOUSEHOVERHEIGHT, 0, ref height, 0);
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMOUSEHOVERWIDTH, 0, ref width, 0);
return new Size(width, height);
}
}
///
///
/// Gets the time, in milliseconds, that the mouse pointer has to stay in the hover rectangle.
///
///
public static int MouseHoverTime {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMOUSEHOVERTIME, 0, ref data, 0);
return data;
}
}
///
///
/// Gets the current mouse speed.
///
///
public static int MouseSpeed {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMOUSESPEED, 0, ref data, 0);
return data;
}
}
///
///
/// Determines whether the snap-to-default-button feature is enabled.
///
///
public static bool IsSnapToDefaultEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETSNAPTODEFBUTTON, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Determines whether the Popup Menus are left Aligned or Right Aligned.
///
///
public static LeftRightAlignment PopupMenuAlignment {
get {
bool data = false;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMENUDROPALIGNMENT, 0, ref data, 0);
if (data) {
return LeftRightAlignment.Left;
}
else {
return LeftRightAlignment.Right;
}
}
}
///
///
/// Determines whether the maenu fade animation feature is enabled. Defaults to false
/// downlevel.
///
///
public static bool IsMenuFadeEnabled {
get {
if (OSFeature.Feature.OnXp || OSFeature.Feature.OnWin2k) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMENUFADE, 0, ref data, 0);
return data != 0;
}
return false;
}
}
///
///
/// Indicates the time, in milliseconds, that the system waits before displaying a shortcut menu.
///
///
public static int MenuShowDelay {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMENUSHOWDELAY, 0, ref data, 0);
return data;
}
}
///
///
/// Indicates whether the slide open effect for combo boxes is enabled.
///
///
public static bool IsComboBoxAnimationEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETCOMBOBOXANIMATION, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Indicates whether the gradient effect for windows title bars is enabled.
///
///
public static bool IsTitleBarGradientEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETGRADIENTCAPTIONS, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Indicates whether the hot tracking of user interface elements is enabled.
///
///
public static bool IsHotTrackingEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETHOTTRACKING, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Indicates whether the smooth scrolling effect for listbox is enabled.
///
///
public static bool IsListBoxSmoothScrollingEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETLISTBOXSMOOTHSCROLLING, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Indicates whether the menu animation feature is enabled.
///
///
public static bool IsMenuAnimationEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMENUANIMATION, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Indicates whether the selection fade effect is enabled. Defaults to false
/// downlevel.
///
///
public static bool IsSelectionFadeEnabled {
get {
if (OSFeature.Feature.OnXp || OSFeature.Feature.OnWin2k) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETSELECTIONFADE, 0, ref data, 0);
return data != 0;
}
return false;
}
}
///
///
/// Indicates whether the tool tip animation is enabled. Defaults to false
/// downlevel.
///
///
public static bool IsToolTipAnimationEnabled {
get {
if (OSFeature.Feature.OnXp || OSFeature.Feature.OnWin2k) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETTOOLTIPANIMATION, 0, ref data, 0);
return data != 0;
}
return false;
}
}
///
///
/// Indicates whether all the UI Effects are enabled. Defaults to false
/// downlevel.
///
///
public static bool UIEffectsEnabled {
get {
if (OSFeature.Feature.OnXp || OSFeature.Feature.OnWin2k) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETUIEFFECTS, 0, ref data, 0);
return data != 0;
}
return false;
}
}
///
///
/// Indicates whether the active windows tracking (activating the window the mouse in on) is ON or OFF.
///
///
public static bool IsActiveWindowTrackingEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETACTIVEWINDOWTRACKING, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Retrieves the active window tracking delay, in milliseconds.
///
///
public static int ActiveWindowTrackingDelay {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETACTIVEWNDTRKTIMEOUT, 0, ref data, 0);
return data;
}
}
///
///
/// Indicates whether the active windows tracking (activating the window the mouse in on) is ON or OFF.
///
///
public static bool IsMinimizeRestoreAnimationEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETANIMATION, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Retrieves the border multiplier factor that determines the width of a windo's sizing border.
///
///
public static int BorderMultiplierFactor {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETBORDER, 0, ref data, 0);
return data;
}
}
///
///
/// Indicates the caret blink time.
///
///
public static int CaretBlinkTime {
get {
return unchecked((int)SafeNativeMethods.GetCaretBlinkTime());
}
}
///
///
/// Indicates the caret width in edit controls.
///
///
public static int CaretWidth {
get {
if (OSFeature.Feature.OnXp || OSFeature.Feature.OnWin2k) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETCARETWIDTH, 0, ref data, 0);
return data;
}
else {
throw new NotSupportedException(SR.GetString(SR.SystemInformationFeatureNotSupported));
}
}
}
///
///
/// None.
///
///
public static int MouseWheelScrollDelta {
get {
return NativeMethods.WHEEL_DELTA;
}
}
///
///
/// The width of the left and right edges of the focus rectangle.
///
///
public static int VerticalFocusThickness {
get {
if (OSFeature.Feature.OnXp) {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYFOCUSBORDER);
}
else {
throw new NotSupportedException(SR.GetString(SR.SystemInformationFeatureNotSupported));
}
}
}
///
///
/// The width of the top and bottom edges of the focus rectangle.
///
///
public static int HorizontalFocusThickness {
get {
if (OSFeature.Feature.OnXp) {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXFOCUSBORDER);
}
else {
throw new NotSupportedException(SR.GetString(SR.SystemInformationFeatureNotSupported));
}
}
}
///
///
/// The height of the vertical sizing border around the perimeter of the window that can be resized.
///
///
public static int VerticalResizeBorderThickness {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYSIZEFRAME);
}
}
///
///
/// The width of the horizontal sizing border around the perimeter of the window that can be resized.
///
///
public static int HorizontalResizeBorderThickness {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXSIZEFRAME);
}
}
///
///
/// The orientation of the screen in degrees.
///
///
public static ScreenOrientation ScreenOrientation {
get {
ScreenOrientation so = ScreenOrientation.Angle0;
NativeMethods.DEVMODE dm = new NativeMethods.DEVMODE();
dm.dmSize = (short) Marshal.SizeOf(typeof(NativeMethods.DEVMODE));
dm.dmDriverExtra = 0;
try {
SafeNativeMethods.EnumDisplaySettings(null, -1 /*ENUM_CURRENT_SETTINGS*/, ref dm);
if ( (dm.dmFields & NativeMethods.DM_DISPLAYORIENTATION) > 0) {
so = dm.dmDisplayOrientation;
}
}
catch {
// empty catch, we'll just return the default if the call to EnumDisplaySettings fails.
}
return so;
}
}
///
///
/// Specifies the thikness, in pixels, of the Sizing Border.
///
///
public static int SizingBorderWidth {
get {
//we can get the system's menu font through the NONCLIENTMETRICS structure via SystemParametersInfo
//
NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS();
bool result = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0);
if (result && data.iBorderWidth > 0) {
return data.iBorderWidth;
}
else {
return 0;
}
}
}
/*
///
///
/// Specified the width, in pixels, of a standard vertical scrollbar.
///
///
public static int VerticalScrollBarWidth {
get {
//we can get the system's menu font through the NONCLIENTMETRICS structure via SystemParametersInfo
//
NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS();
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0);
if (result && data.iScrollWidth > 0) {
return data.iScrollWidth;
}
else {
return 0;
}
}
}
///
///
/// Specified the height, in pixels, of a standard horizontal scrollbar.
///
///
public static int HorizontalScrollBarWidth {
get {
//we can get the system's menu font through the NONCLIENTMETRICS structure via SystemParametersInfo
//
NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS();
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0);
if (result && data.iScrollHeight > 0) {
return data.iScrollHeight;
}
else {
return 0;
}
}
}
///
///
/// Specified the Size, in pixels, of the caption buttons.
///
///
public static Size CaptionButtonSize {
get {
//we can get the system's menu font through the NONCLIENTMETRICS structure via SystemParametersInfo
//
NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS();
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0);
if (result && data.iCaptionHeight > 0 && data.iCaptionWidth > 0) {
return new Size(data.iCaptionWidth, data.iCaptionHeight);
}
else {
return return new Size(0, 0);
}
}
}
*/
///
///
/// Specified the Size, in pixels, of the small caption buttons.
///
///
public static Size SmallCaptionButtonSize {
get {
//we can get the system's menu font through the NONCLIENTMETRICS structure via SystemParametersInfo
//
NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS();
bool result = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0);
if (result && data.iSmCaptionHeight > 0 && data.iSmCaptionWidth > 0) {
return new Size(data.iSmCaptionWidth, data.iSmCaptionHeight);
}
else {
return Size.Empty;
}
}
}
///
///
/// Specified the Size, in pixels, of the menu bar buttons.
///
///
public static Size MenuBarButtonSize {
get {
//we can get the system's menu font through the NONCLIENTMETRICS structure via SystemParametersInfo
//
NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS();
bool result = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0);
if (result && data.iMenuHeight > 0 && data.iMenuWidth > 0) {
return new Size(data.iMenuWidth, data.iMenuHeight);
}
else {
return Size.Empty;
}
}
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////
// End ADDITIONS FOR WHIDBEY //
//////////////////////////////////////////////////////////////////////////////////////////////////////////
///
/// Checks whether the current Winforms app is running on a secure desktop under a terminal
/// server session. This is the case when the TS session has been locked.
/// This method is useful when calling into GDI+ Graphics methods that modify the object's
/// state, these methods fail under a locked terminal session.
///
internal static bool InLockedTerminalSession() {
bool retVal = false;
if (SystemInformation.TerminalServerSession) {
// Let's try to open the input desktop, it it fails with access denied assume
// the app is running on a secure desktop.
IntPtr hDsk = SafeNativeMethods.OpenInputDesktop(0, false, NativeMethods.DESKTOP_SWITCHDESKTOP);
if (hDsk == IntPtr.Zero) {
int error = Marshal.GetLastWin32Error();
retVal = error == NativeMethods.ERROR_ACCESS_DENIED;
}
}
return retVal;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
/*
*/
namespace System.Windows.Forms {
using System.Text;
using System.Configuration.Assemblies;
using System.Threading;
using System.Runtime.Remoting;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System;
using Microsoft.Win32;
using System.IO;
using System.Security;
using System.Security.Permissions;
using System.Drawing;
using System.ComponentModel;
///
/// Provides information about the operating system.
///
public class SystemInformation {
// private constructor to prevent creation
//
private SystemInformation() {
}
// Figure out if all the multimon stuff is supported on the OS
//
private static bool checkMultiMonitorSupport = false;
private static bool multiMonitorSupport = false;
private static bool checkNativeMouseWheelSupport = false;
private static bool nativeMouseWheelSupport = true;
private static bool highContrast = false;
private static bool systemEventsAttached = false;
private static bool systemEventsDirty = true;
private static IntPtr processWinStation = IntPtr.Zero;
private static bool isUserInteractive = false;
private static PowerStatus powerStatus = null;
private const int DefaultMouseWheelScrollLines = 3;
////////////////////////////////////////////////////////////////////////////
// SystemParametersInfo
//
///
///
/// Gets a value indicating whether the user has enabled full window drag.
///
///
public static bool DragFullWindows {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETDRAGFULLWINDOWS, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Gets a value indicating whether the user has selected to run in high contrast
/// mode.
///
///
public static bool HighContrast {
get {
EnsureSystemEvents();
if (systemEventsDirty) {
NativeMethods.HIGHCONTRAST_I data = new NativeMethods.HIGHCONTRAST_I();
data.cbSize = Marshal.SizeOf(data);
data.dwFlags = 0;
data.lpszDefaultScheme = IntPtr.Zero;
bool b = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETHIGHCONTRAST, data.cbSize, ref data, 0);
// NT4 does not support this parameter, so we always force
// it to false if we fail to get the parameter.
//
if (b) {
highContrast = (data.dwFlags & NativeMethods.HCF_HIGHCONTRASTON) != 0;
}
else {
highContrast = false;
}
systemEventsDirty = false;
}
return highContrast;
}
}
///
///
/// Gets the number of lines to scroll when the mouse wheel is rotated.
///
///
public static int MouseWheelScrollLines {
get {
if (NativeMouseWheelSupport) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETWHEELSCROLLLINES, 0, ref data, 0);
return data;
}
else {
IntPtr hWndMouseWheel = IntPtr.Zero;
// Check for the MouseZ "service". This is a little app that generated the
// MSH_MOUSEWHEEL messages by monitoring the hardware. If this app isn't
// found, then there is no support for MouseWheels on the system.
//
hWndMouseWheel = UnsafeNativeMethods.FindWindow(NativeMethods.MOUSEZ_CLASSNAME, NativeMethods.MOUSEZ_TITLE);
if (hWndMouseWheel != IntPtr.Zero) {
// Register the MSH_SCROLL_LINES message...
//
int message = SafeNativeMethods.RegisterWindowMessage(NativeMethods.MSH_SCROLL_LINES);
int lines = (int)UnsafeNativeMethods.SendMessage(new HandleRef(null, hWndMouseWheel), message, 0, 0);
// this fails under terminal server, so we default to 3, which is the windows
// default. Nobody seems to pay attention to this value anyways...
if (lines != 0) {
return lines;
}
}
}
return DefaultMouseWheelScrollLines;
}
}
////////////////////////////////////////////////////////////////////////////
// SystemMetrics
//
///
///
/// Gets the dimensions of the primary display monitor in pixels.
///
///
public static Size PrimaryMonitorSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXSCREEN),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYSCREEN));
}
}
///
///
/// Gets the width of the vertical scroll bar in pixels.
///
///
public static int VerticalScrollBarWidth {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXVSCROLL);
}
}
///
///
/// Gets the height of the horizontal scroll bar in pixels.
///
///
public static int HorizontalScrollBarHeight {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYHSCROLL);
}
}
///
///
/// Gets the height of the normal caption area of a window in pixels.
///
///
public static int CaptionHeight {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYCAPTION);
}
}
///
///
/// Gets the width and
/// height of a window border in pixels.
///
///
public static Size BorderSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXBORDER),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYBORDER));
}
}
///
///
/// Gets the thickness in pixels, of the border for a window that has a caption
/// and is not resizable.
///
///
public static Size FixedFrameBorderSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXFIXEDFRAME),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYFIXEDFRAME));
}
}
///
/// Gets the height of the scroll box in a vertical scroll bar in pixels.
///
public static int VerticalScrollBarThumbHeight {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYVTHUMB);
}
}
///
/// Gets the width of the scroll box in a horizontal scroll bar in pixels.
///
public static int HorizontalScrollBarThumbWidth {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXHTHUMB);
}
}
/*
///
///
/// Gets the default dimensions of an icon in pixels.
///
///
public static Size IconSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXICON),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYICON));
}
}
///
///
/// Gets the dimensions of a cursor in pixels.
///
///
public static Size CursorSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXCURSOR),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYCURSOR));
}
}
///
///
/// Gets the system's font for menus.
///
///
public static Font MenuFont {
get {
Font menuFont = null;
//we can get the system's menu font through the NONCLIENTMETRICS structure via SystemParametersInfo
//
NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS();
bool result = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0);
if (result && data.lfMenuFont != null) {
// SECREVIEW : This assert is safe since we created the NONCLIENTMETRICS struct.
//
IntSecurity.ObjectFromWin32Handle.Assert();
try {
menuFont = Font.FromLogFont(data.lfMenuFont);
}
catch {
// menu font is not true type. Default to standard control font.
//
menuFont = Control.DefaultFont;
}
finally {
CodeAccessPermission.RevertAssert();
}
}
return menuFont;
}
}
///
///
/// Gets the height of a one line of a menu in pixels.
///
///
public static int MenuHeight {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMENU);
}
}
///
///
/// Returns the current system power status.
///
///
public static PowerStatus PowerStatus
{
get
{
if (powerStatus == null) {
powerStatus = new PowerStatus();
}
return powerStatus;
}
}
///
///
/// Gets the size of the working area in pixels.
///
///
public static Rectangle WorkingArea {
get {
NativeMethods.RECT rc = new NativeMethods.RECT();
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETWORKAREA, 0, ref rc, 0);
return Rectangle.FromLTRB(rc.left, rc.top, rc.right, rc.bottom);
}
}
///
///
/// Gets
/// the height, in pixels, of the Kanji window at the bottom
/// of the screen for double-byte (DBCS) character set versions of Windows.
///
///
public static int KanjiWindowHeight {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYKANJIWINDOW);
}
}
///
///
/// Gets a value indicating whether the system has a mouse installed.
///
///
[EditorBrowsable(EditorBrowsableState.Never)]
public static bool MousePresent {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_MOUSEPRESENT) != 0;
}
}
///
///
/// Gets the height in pixels, of the arrow bitmap on the vertical scroll bar.
///
///
public static int VerticalScrollBarArrowHeight {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYVSCROLL);
}
}
///
///
/// Gets the width, in pixels, of the arrow bitmap on the horizontal scrollbar.
///
///
public static int HorizontalScrollBarArrowWidth {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXHSCROLL);
}
}
///
///
/// Gets a value indicating whether this is a debug version of the operating
/// system.
///
///
public static bool DebugOS {
get {
Debug.WriteLineIf(IntSecurity.SecurityDemand.TraceVerbose, "SensitiveSystemInformation Demanded");
IntSecurity.SensitiveSystemInformation.Demand();
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_DEBUG) != 0;
}
}
///
///
/// Gets a value indicating whether the functions of the left and right mouse
/// buttons have been swapped.
///
///
public static bool MouseButtonsSwapped {
get {
return(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_SWAPBUTTON) != 0);
}
}
///
///
/// Gets the minimum allowable dimensions of a window in pixels.
///
///
public static Size MinimumWindowSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMIN),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMIN));
}
}
///
///
/// Gets the dimensions in pixels, of a caption bar or title bar
/// button.
///
///
public static Size CaptionButtonSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXSIZE),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYSIZE));
}
}
///
///
/// Gets the thickness in pixels, of the border for a window that can be resized.
///
///
public static Size FrameBorderSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXFRAME),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYFRAME));
}
}
///
///
/// Gets the system's default
/// minimum tracking dimensions of a window in pixels.
///
///
public static Size MinWindowTrackSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMINTRACK),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMINTRACK));
}
}
///
///
/// Gets the dimensions in pixels, of the area that the user must click within
/// for the system to consider the two clicks a double-click. The rectangle is
/// centered around the first click.
///
///
public static Size DoubleClickSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXDOUBLECLK),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYDOUBLECLK));
}
}
///
///
/// Gets the maximum number of milliseconds allowed between mouse clicks for a
/// double-click.
///
///
public static int DoubleClickTime {
get {
return SafeNativeMethods.GetDoubleClickTime();
}
}
///
///
/// Gets
/// the dimensions in pixels, of the grid used
/// to arrange icons in a large icon view.
///
///
public static Size IconSpacingSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXICONSPACING),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYICONSPACING));
}
}
///
///
/// Gets a value indicating whether drop down menus should be right-aligned with
/// the corresponding menu bar item.
///
///
public static bool RightAlignedMenus {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_MENUDROPALIGNMENT) != 0;
}
}
///
///
/// Gets a value indicating whether the Microsoft Windows for Pen computing
/// extensions are installed.
///
///
public static bool PenWindows {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_PENWINDOWS) != 0;
}
}
///
///
/// Gets a value indicating whether the operating system is capable of handling
/// double-byte (DBCS) characters.
///
///
public static bool DbcsEnabled {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_DBCSENABLED) != 0;
}
}
///
///
/// Gets the number of buttons on mouse.
///
///
public static int MouseButtons {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CMOUSEBUTTONS);
}
}
///
///
/// Gets a value indicating whether security is present on this operating system.
///
///
public static bool Secure {
get {
Debug.WriteLineIf(IntSecurity.SecurityDemand.TraceVerbose, "SensitiveSystemInformation Demanded");
IntSecurity.SensitiveSystemInformation.Demand();
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_SECURE) != 0;
}
}
///
///
/// Gets the dimensions in pixels, of a 3-D
/// border.
///
///
public static Size Border3DSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXEDGE),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYEDGE));
}
}
///
/// Gets the dimensions
/// in pixels, of
/// the grid into which minimized windows will be placed.
///
public static Size MinimizedWindowSpacingSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMINSPACING),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMINSPACING));
}
}
///
///
/// Gets
/// the recommended dimensions of a small icon in pixels.
///
///
public static Size SmallIconSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXSMICON),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYSMICON));
}
}
///
///
/// Gets the height of
/// a small caption in pixels.
///
///
public static int ToolWindowCaptionHeight {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYSMCAPTION);
}
}
///
///
/// Gets the
/// dimensions of small caption buttons in pixels.
///
///
public static Size ToolWindowCaptionButtonSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXSMSIZE),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYSMSIZE));
}
}
///
///
/// Gets
/// the dimensions in pixels, of menu bar buttons.
///
///
public static Size MenuButtonSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMENUSIZE),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMENUSIZE));
}
}
///
/// Gets flags specifying how the system arranges minimized windows.
///
public static ArrangeStartingPosition ArrangeStartingPosition {
get {
ArrangeStartingPosition mask = ArrangeStartingPosition.BottomLeft | ArrangeStartingPosition.BottomRight | ArrangeStartingPosition.Hide | ArrangeStartingPosition.TopLeft | ArrangeStartingPosition.TopRight;
int compoundValue = UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_ARRANGE);
return mask & (ArrangeStartingPosition) compoundValue;
}
}
///
///
/// Gets flags specifying how the system arranges minimized windows.
///
///
public static ArrangeDirection ArrangeDirection {
get {
ArrangeDirection mask = ArrangeDirection.Down | ArrangeDirection.Left | ArrangeDirection.Right | ArrangeDirection.Up;
int compoundValue = UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_ARRANGE);
return mask & (ArrangeDirection) compoundValue;
}
}
///
///
/// Gets the dimensions in pixels, of a normal minimized window.
///
///
public static Size MinimizedWindowSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMINIMIZED),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMINIMIZED));
}
}
///
///
/// Gets the default maximum dimensions in pixels, of a
/// window that has a caption and sizing borders.
///
///
public static Size MaxWindowTrackSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMAXTRACK),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMAXTRACK));
}
}
///
///
/// Gets the default dimensions, in pixels, of a maximized top-left window on the
/// primary monitor.
///
///
public static Size PrimaryMonitorMaximizedWindowSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMAXIMIZED),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMAXIMIZED));
}
}
///
///
/// Gets a value indicating whether this computer is connected to a network.
///
///
public static bool Network {
get {
return(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_NETWORK) & 0x00000001) != 0;
}
}
///
///
/// To be supplied.
///
///
public static bool TerminalServerSession {
get {
return(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_REMOTESESSION) & 0x00000001) != 0;
}
}
///
///
/// Gets a value that specifies how the system was started.
///
///
public static BootMode BootMode {
get {
Debug.WriteLineIf(IntSecurity.SecurityDemand.TraceVerbose, "SensitiveSystemInformation Demanded");
IntSecurity.SensitiveSystemInformation.Demand();
return(BootMode) UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CLEANBOOT);
}
}
///
///
/// Gets the dimensions in pixels, of the rectangle that a drag operation
/// must extend to be considered a drag. The rectangle is centered on a drag
/// point.
///
///
public static Size DragSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXDRAG),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYDRAG));
}
}
///
///
/// Gets a value indicating whether the user requires an application to present
/// information visually in situations where it would otherwise present the
/// information in audible form.
///
///
public static bool ShowSounds {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_SHOWSOUNDS) != 0;
}
}
///
///
/// Gets the
/// dimensions of the default size of a menu checkmark in pixels.
///
///
public static Size MenuCheckSize {
get {
return new Size(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXMENUCHECK),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYMENUCHECK));
}
}
///
///
/// Gets a value
/// indicating whether the system is enabled for Hebrew and Arabic languages.
///
///
public static bool MidEastEnabled {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_MIDEASTENABLED) != 0;
}
}
private static bool MultiMonitorSupport {
get {
if (!checkMultiMonitorSupport) {
multiMonitorSupport = (UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CMONITORS) != 0);
checkMultiMonitorSupport = true;
}
return multiMonitorSupport;
}
}
///
///
/// Gets a value indicating whether the system natively supports the mouse wheel
/// in newer mice.
///
///
public static bool NativeMouseWheelSupport {
get {
if (!checkNativeMouseWheelSupport) {
nativeMouseWheelSupport = (UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_MOUSEWHEELPRESENT) != 0);
checkNativeMouseWheelSupport = true;
}
return nativeMouseWheelSupport;
}
}
///
///
/// Gets a value indicating whether there is a mouse with a mouse wheel
/// installed on this machine.
///
///
public static bool MouseWheelPresent {
get {
bool mouseWheelPresent = false;
if (!NativeMouseWheelSupport) {
IntPtr hWndMouseWheel = IntPtr.Zero;
// Check for the MouseZ "service". This is a little app that generated the
// MSH_MOUSEWHEEL messages by monitoring the hardware. If this app isn't
// found, then there is no support for MouseWheels on the system.
//
hWndMouseWheel = UnsafeNativeMethods.FindWindow(NativeMethods.MOUSEZ_CLASSNAME, NativeMethods.MOUSEZ_TITLE);
if (hWndMouseWheel != IntPtr.Zero) {
mouseWheelPresent = true;
}
}
else {
mouseWheelPresent = (UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_MOUSEWHEELPRESENT) != 0);
}
return mouseWheelPresent;
}
}
///
///
/// Gets the
/// bounds of the virtual screen.
///
///
public static Rectangle VirtualScreen {
get {
if (MultiMonitorSupport) {
return new Rectangle(UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_XVIRTUALSCREEN),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_YVIRTUALSCREEN),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXVIRTUALSCREEN),
UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYVIRTUALSCREEN));
}
else {
Size size = PrimaryMonitorSize;
return new Rectangle(0, 0, size.Width, size.Height);
}
}
}
///
///
/// Gets the number of display monitors on the desktop.
///
///
public static int MonitorCount {
get {
if (MultiMonitorSupport) {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CMONITORS);
}
else {
return 1;
}
}
}
///
///
/// Gets a value indicating whether all the display monitors have the
/// same color format.
///
///
public static bool MonitorsSameDisplayFormat {
get {
if (MultiMonitorSupport) {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_SAMEDISPLAYFORMAT) != 0;
}
else {
return true;
}
}
}
////////////////////////////////////////////////////////////////////////////
// Misc
//
///
///
/// Gets the computer name of the current system.
///
///
public static string ComputerName {
get {
Debug.WriteLineIf(IntSecurity.SecurityDemand.TraceVerbose, "SensitiveSystemInformation Demanded");
IntSecurity.SensitiveSystemInformation.Demand();
StringBuilder sb = new StringBuilder(256);
UnsafeNativeMethods.GetComputerName(sb, new int[] {sb.Capacity});
return sb.ToString();
}
}
///
/// Gets the user's domain name.
///
public static string UserDomainName {
get {
return Environment.UserDomainName;
}
}
///
///
/// Gets a value indicating whether the current process is running in user
/// interactive mode.
///
///
public static bool UserInteractive {
get {
if (Environment.OSVersion.Platform == System.PlatformID.Win32NT) {
IntPtr hwinsta = IntPtr.Zero;
hwinsta = UnsafeNativeMethods.GetProcessWindowStation();
if (hwinsta != IntPtr.Zero && processWinStation != hwinsta) {
isUserInteractive = true;
int lengthNeeded = 0;
NativeMethods.USEROBJECTFLAGS flags = new NativeMethods.USEROBJECTFLAGS();
if (UnsafeNativeMethods.GetUserObjectInformation(new HandleRef(null, hwinsta), NativeMethods.UOI_FLAGS, flags, Marshal.SizeOf(flags), ref lengthNeeded)) {
if ((flags.dwFlags & NativeMethods.WSF_VISIBLE) == 0) {
isUserInteractive = false;
}
}
processWinStation = hwinsta;
}
}
else {
isUserInteractive = true;
}
return isUserInteractive;
}
}
///
///
/// Gets the user name for the current thread, that is, the name of the
/// user currently logged onto the system.
///
///
public static string UserName {
get {
Debug.WriteLineIf(IntSecurity.SecurityDemand.TraceVerbose, "SensitiveSystemInformation Demanded");
IntSecurity.SensitiveSystemInformation.Demand();
StringBuilder sb = new StringBuilder(256);
UnsafeNativeMethods.GetUserName(sb, new int[] {sb.Capacity});
return sb.ToString();
}
}
private static void EnsureSystemEvents() {
if (!systemEventsAttached) {
SystemEvents.UserPreferenceChanged += new UserPreferenceChangedEventHandler(SystemInformation.OnUserPreferenceChanged);
systemEventsAttached = true;
}
}
private static void OnUserPreferenceChanged(object sender, UserPreferenceChangedEventArgs pref) {
systemEventsDirty = true;
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////
// NEW ADDITIONS FOR WHIDBEY //
//////////////////////////////////////////////////////////////////////////////////////////////////////////
///
///
/// Gets a value indicating whether the drop shadow effect in enabled. Defaults to false
/// downlevel.
///
///
public static bool IsDropShadowEnabled {
get {
if (OSFeature.Feature.OnXp) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETDROPSHADOW, 0, ref data, 0);
return data != 0;
}
return false;
}
}
///
///
/// Gets a value indicating whether the native user menus have a flat menu appearance. Defaults to false
/// downlevel.
///
///
public static bool IsFlatMenuEnabled {
get {
if (OSFeature.Feature.OnXp) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETFLATMENU, 0, ref data, 0);
return data != 0;
}
return false;
}
}
///
///
/// Gets a value indicating whether the Font Smoothing OSFeature.Feature is enabled.
///
///
public static bool IsFontSmoothingEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETFONTSMOOTHING, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Returns a contrast value that is ClearType smoothing.
///
///
public static int FontSmoothingContrast {
get {
if (OSFeature.Feature.OnXp) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETFONTSMOOTHINGCONTRAST, 0, ref data, 0);
return data;
}
else {
throw new NotSupportedException(SR.GetString(SR.SystemInformationFeatureNotSupported));
}
}
}
///
///
/// Returns a type of Font smoothing.
///
///
public static int FontSmoothingType {
get {
if (OSFeature.Feature.OnXp) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETFONTSMOOTHINGTYPE, 0, ref data, 0);
return data;
}
else {
throw new NotSupportedException(SR.GetString(SR.SystemInformationFeatureNotSupported));
}
}
}
///
///
/// Retrieves the width in pixels of an icon cell.
///
///
public static int IconHorizontalSpacing {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_ICONHORIZONTALSPACING, 0, ref data, 0);
return data;
}
}
///
///
/// Retrieves the height in pixels of an icon cell.
///
///
public static int IconVerticalSpacing {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_ICONVERTICALSPACING, 0, ref data, 0);
return data;
}
}
///
///
/// Gets a value indicating whether the Icon title wrapping is enabled.
///
///
public static bool IsIconTitleWrappingEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETICONTITLEWRAP, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Gets a value indicating whether the menu access keys are always underlined.
///
///
public static bool MenuAccessKeysUnderlined {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETKEYBOARDCUES, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Retrieves the Keyboard repeat delay setting, which is a value in the
/// range from 0 through 3. The Actual Delay Associated with each value may vary depending on the
/// hardware.
///
///
public static int KeyboardDelay {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETKEYBOARDDELAY, 0, ref data, 0);
return data;
}
}
///
///
/// Gets a value indicating whether the user relies on Keyboard instead of mouse and wants
/// applications to display keyboard interfaces that would be otherwise hidden.
///
///
public static bool IsKeyboardPreferred {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETKEYBOARDPREF, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Retrieves the Keyboard repeat speed setting, which is a value in the
/// range from 0 through 31. The actual rate may vary depending on the
/// hardware.
///
///
public static int KeyboardSpeed {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETKEYBOARDSPEED, 0, ref data, 0);
return data;
}
}
///
///
/// Gets the Size in pixels of the rectangle within which the mouse pointer has to stay.
///
///
public static Size MouseHoverSize {
get {
int height = 0;
int width = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMOUSEHOVERHEIGHT, 0, ref height, 0);
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMOUSEHOVERWIDTH, 0, ref width, 0);
return new Size(width, height);
}
}
///
///
/// Gets the time, in milliseconds, that the mouse pointer has to stay in the hover rectangle.
///
///
public static int MouseHoverTime {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMOUSEHOVERTIME, 0, ref data, 0);
return data;
}
}
///
///
/// Gets the current mouse speed.
///
///
public static int MouseSpeed {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMOUSESPEED, 0, ref data, 0);
return data;
}
}
///
///
/// Determines whether the snap-to-default-button feature is enabled.
///
///
public static bool IsSnapToDefaultEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETSNAPTODEFBUTTON, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Determines whether the Popup Menus are left Aligned or Right Aligned.
///
///
public static LeftRightAlignment PopupMenuAlignment {
get {
bool data = false;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMENUDROPALIGNMENT, 0, ref data, 0);
if (data) {
return LeftRightAlignment.Left;
}
else {
return LeftRightAlignment.Right;
}
}
}
///
///
/// Determines whether the maenu fade animation feature is enabled. Defaults to false
/// downlevel.
///
///
public static bool IsMenuFadeEnabled {
get {
if (OSFeature.Feature.OnXp || OSFeature.Feature.OnWin2k) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMENUFADE, 0, ref data, 0);
return data != 0;
}
return false;
}
}
///
///
/// Indicates the time, in milliseconds, that the system waits before displaying a shortcut menu.
///
///
public static int MenuShowDelay {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMENUSHOWDELAY, 0, ref data, 0);
return data;
}
}
///
///
/// Indicates whether the slide open effect for combo boxes is enabled.
///
///
public static bool IsComboBoxAnimationEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETCOMBOBOXANIMATION, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Indicates whether the gradient effect for windows title bars is enabled.
///
///
public static bool IsTitleBarGradientEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETGRADIENTCAPTIONS, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Indicates whether the hot tracking of user interface elements is enabled.
///
///
public static bool IsHotTrackingEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETHOTTRACKING, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Indicates whether the smooth scrolling effect for listbox is enabled.
///
///
public static bool IsListBoxSmoothScrollingEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETLISTBOXSMOOTHSCROLLING, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Indicates whether the menu animation feature is enabled.
///
///
public static bool IsMenuAnimationEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETMENUANIMATION, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Indicates whether the selection fade effect is enabled. Defaults to false
/// downlevel.
///
///
public static bool IsSelectionFadeEnabled {
get {
if (OSFeature.Feature.OnXp || OSFeature.Feature.OnWin2k) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETSELECTIONFADE, 0, ref data, 0);
return data != 0;
}
return false;
}
}
///
///
/// Indicates whether the tool tip animation is enabled. Defaults to false
/// downlevel.
///
///
public static bool IsToolTipAnimationEnabled {
get {
if (OSFeature.Feature.OnXp || OSFeature.Feature.OnWin2k) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETTOOLTIPANIMATION, 0, ref data, 0);
return data != 0;
}
return false;
}
}
///
///
/// Indicates whether all the UI Effects are enabled. Defaults to false
/// downlevel.
///
///
public static bool UIEffectsEnabled {
get {
if (OSFeature.Feature.OnXp || OSFeature.Feature.OnWin2k) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETUIEFFECTS, 0, ref data, 0);
return data != 0;
}
return false;
}
}
///
///
/// Indicates whether the active windows tracking (activating the window the mouse in on) is ON or OFF.
///
///
public static bool IsActiveWindowTrackingEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETACTIVEWINDOWTRACKING, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Retrieves the active window tracking delay, in milliseconds.
///
///
public static int ActiveWindowTrackingDelay {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETACTIVEWNDTRKTIMEOUT, 0, ref data, 0);
return data;
}
}
///
///
/// Indicates whether the active windows tracking (activating the window the mouse in on) is ON or OFF.
///
///
public static bool IsMinimizeRestoreAnimationEnabled {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETANIMATION, 0, ref data, 0);
return data != 0;
}
}
///
///
/// Retrieves the border multiplier factor that determines the width of a windo's sizing border.
///
///
public static int BorderMultiplierFactor {
get {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETBORDER, 0, ref data, 0);
return data;
}
}
///
///
/// Indicates the caret blink time.
///
///
public static int CaretBlinkTime {
get {
return unchecked((int)SafeNativeMethods.GetCaretBlinkTime());
}
}
///
///
/// Indicates the caret width in edit controls.
///
///
public static int CaretWidth {
get {
if (OSFeature.Feature.OnXp || OSFeature.Feature.OnWin2k) {
int data = 0;
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETCARETWIDTH, 0, ref data, 0);
return data;
}
else {
throw new NotSupportedException(SR.GetString(SR.SystemInformationFeatureNotSupported));
}
}
}
///
///
/// None.
///
///
public static int MouseWheelScrollDelta {
get {
return NativeMethods.WHEEL_DELTA;
}
}
///
///
/// The width of the left and right edges of the focus rectangle.
///
///
public static int VerticalFocusThickness {
get {
if (OSFeature.Feature.OnXp) {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYFOCUSBORDER);
}
else {
throw new NotSupportedException(SR.GetString(SR.SystemInformationFeatureNotSupported));
}
}
}
///
///
/// The width of the top and bottom edges of the focus rectangle.
///
///
public static int HorizontalFocusThickness {
get {
if (OSFeature.Feature.OnXp) {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXFOCUSBORDER);
}
else {
throw new NotSupportedException(SR.GetString(SR.SystemInformationFeatureNotSupported));
}
}
}
///
///
/// The height of the vertical sizing border around the perimeter of the window that can be resized.
///
///
public static int VerticalResizeBorderThickness {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CYSIZEFRAME);
}
}
///
///
/// The width of the horizontal sizing border around the perimeter of the window that can be resized.
///
///
public static int HorizontalResizeBorderThickness {
get {
return UnsafeNativeMethods.GetSystemMetrics(NativeMethods.SM_CXSIZEFRAME);
}
}
///
///
/// The orientation of the screen in degrees.
///
///
public static ScreenOrientation ScreenOrientation {
get {
ScreenOrientation so = ScreenOrientation.Angle0;
NativeMethods.DEVMODE dm = new NativeMethods.DEVMODE();
dm.dmSize = (short) Marshal.SizeOf(typeof(NativeMethods.DEVMODE));
dm.dmDriverExtra = 0;
try {
SafeNativeMethods.EnumDisplaySettings(null, -1 /*ENUM_CURRENT_SETTINGS*/, ref dm);
if ( (dm.dmFields & NativeMethods.DM_DISPLAYORIENTATION) > 0) {
so = dm.dmDisplayOrientation;
}
}
catch {
// empty catch, we'll just return the default if the call to EnumDisplaySettings fails.
}
return so;
}
}
///
///
/// Specifies the thikness, in pixels, of the Sizing Border.
///
///
public static int SizingBorderWidth {
get {
//we can get the system's menu font through the NONCLIENTMETRICS structure via SystemParametersInfo
//
NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS();
bool result = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0);
if (result && data.iBorderWidth > 0) {
return data.iBorderWidth;
}
else {
return 0;
}
}
}
/*
///
///
/// Specified the width, in pixels, of a standard vertical scrollbar.
///
///
public static int VerticalScrollBarWidth {
get {
//we can get the system's menu font through the NONCLIENTMETRICS structure via SystemParametersInfo
//
NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS();
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0);
if (result && data.iScrollWidth > 0) {
return data.iScrollWidth;
}
else {
return 0;
}
}
}
///
///
/// Specified the height, in pixels, of a standard horizontal scrollbar.
///
///
public static int HorizontalScrollBarWidth {
get {
//we can get the system's menu font through the NONCLIENTMETRICS structure via SystemParametersInfo
//
NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS();
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0);
if (result && data.iScrollHeight > 0) {
return data.iScrollHeight;
}
else {
return 0;
}
}
}
///
///
/// Specified the Size, in pixels, of the caption buttons.
///
///
public static Size CaptionButtonSize {
get {
//we can get the system's menu font through the NONCLIENTMETRICS structure via SystemParametersInfo
//
NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS();
UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0);
if (result && data.iCaptionHeight > 0 && data.iCaptionWidth > 0) {
return new Size(data.iCaptionWidth, data.iCaptionHeight);
}
else {
return return new Size(0, 0);
}
}
}
*/
///
///
/// Specified the Size, in pixels, of the small caption buttons.
///
///
public static Size SmallCaptionButtonSize {
get {
//we can get the system's menu font through the NONCLIENTMETRICS structure via SystemParametersInfo
//
NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS();
bool result = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0);
if (result && data.iSmCaptionHeight > 0 && data.iSmCaptionWidth > 0) {
return new Size(data.iSmCaptionWidth, data.iSmCaptionHeight);
}
else {
return Size.Empty;
}
}
}
///
///
/// Specified the Size, in pixels, of the menu bar buttons.
///
///
public static Size MenuBarButtonSize {
get {
//we can get the system's menu font through the NONCLIENTMETRICS structure via SystemParametersInfo
//
NativeMethods.NONCLIENTMETRICS data = new NativeMethods.NONCLIENTMETRICS();
bool result = UnsafeNativeMethods.SystemParametersInfo(NativeMethods.SPI_GETNONCLIENTMETRICS, data.cbSize, data, 0);
if (result && data.iMenuHeight > 0 && data.iMenuWidth > 0) {
return new Size(data.iMenuWidth, data.iMenuHeight);
}
else {
return Size.Empty;
}
}
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////
// End ADDITIONS FOR WHIDBEY //
//////////////////////////////////////////////////////////////////////////////////////////////////////////
///
/// Checks whether the current Winforms app is running on a secure desktop under a terminal
/// server session. This is the case when the TS session has been locked.
/// This method is useful when calling into GDI+ Graphics methods that modify the object's
/// state, these methods fail under a locked terminal session.
///
internal static bool InLockedTerminalSession() {
bool retVal = false;
if (SystemInformation.TerminalServerSession) {
// Let's try to open the input desktop, it it fails with access denied assume
// the app is running on a secure desktop.
IntPtr hDsk = SafeNativeMethods.OpenInputDesktop(0, false, NativeMethods.DESKTOP_SWITCHDESKTOP);
if (hDsk == IntPtr.Zero) {
int error = Marshal.GetLastWin32Error();
retVal = error == NativeMethods.ERROR_ACCESS_DENIED;
}
}
return retVal;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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- TabControlAutomationPeer.cs
- BinarySerializer.cs
- IsolatedStorageFileStream.cs
- Axis.cs
- PeerCredential.cs
- _NtlmClient.cs
- FontFamily.cs
- FixedSOMGroup.cs
- TreeViewEvent.cs
- FontStretch.cs
- ToolstripProfessionalRenderer.cs
- ImageListDesigner.cs
- SmtpException.cs
- RichTextBox.cs
- TemplateField.cs
- EventPropertyMap.cs
- TextEditorSelection.cs
- CollectionDataContract.cs
- PowerEase.cs
- TextProperties.cs
- EventLevel.cs
- XmlChildEnumerator.cs
- SafeSecurityHandles.cs
- IntegerValidatorAttribute.cs
- DataGridClipboardCellContent.cs
- Oid.cs
- NameValueCollection.cs
- ResourcesBuildProvider.cs
- DoWorkEventArgs.cs
- RemotingAttributes.cs
- ParserOptions.cs
- Byte.cs
- Directory.cs
- WorkflowItemPresenter.cs
- WindowPatternIdentifiers.cs
- HelpInfo.cs
- SynchronizedReadOnlyCollection.cs
- FastEncoder.cs
- ExtenderControl.cs
- StrokeCollection.cs
- SByte.cs
- SchemaNamespaceManager.cs
- ToolStripContentPanelRenderEventArgs.cs
- WinInetCache.cs
- WebConfigurationManager.cs
- AppSecurityManager.cs
- ReferencedAssembly.cs
- IList.cs
- CompileLiteralTextParser.cs
- XPathEmptyIterator.cs
- DataReaderContainer.cs
- FormViewModeEventArgs.cs
- EntityDataSourceState.cs
- RewritingSimplifier.cs
- CodeExporter.cs
- KoreanLunisolarCalendar.cs
- XPathSingletonIterator.cs
- baseaxisquery.cs
- Popup.cs
- QueueSurrogate.cs
- SqlDataSourceStatusEventArgs.cs
- SoapTypeAttribute.cs
- HasCopySemanticsAttribute.cs
- ParseElement.cs
- SqlErrorCollection.cs
- UriSection.cs
- XmlAttributes.cs
- ZipIOLocalFileHeader.cs
- TogglePattern.cs
- TimeSpanStorage.cs
- FunctionQuery.cs
- SelectedGridItemChangedEvent.cs
- ExceptionUtil.cs
- TraceSwitch.cs
- EntityDataSourceSelectingEventArgs.cs
- EntityContainer.cs
- TargetPerspective.cs
- ProtocolsConfigurationHandler.cs
- MatrixUtil.cs
- WebPartCatalogCloseVerb.cs
- EntityCollection.cs
- securitycriticaldata.cs
- OneOfElement.cs
- HttpModulesSection.cs
- CodeVariableDeclarationStatement.cs
- NameGenerator.cs
- TextPattern.cs
- DataColumnSelectionConverter.cs
- SingleKeyFrameCollection.cs
- DigitalSignatureProvider.cs
- AccessControlList.cs
- DesignerWidgets.cs
- ConfigurationSectionHelper.cs
- SqlDuplicator.cs
- CharEntityEncoderFallback.cs
- SharedDp.cs
- GridViewSelectEventArgs.cs
- WorkflowPrinting.cs
- RegisteredDisposeScript.cs
- DataGridCellItemAutomationPeer.cs