Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Shared / MS / Win32 / SafeSystemMetrics.cs / 1305600 / SafeSystemMetrics.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2004 // // File: SafeSystemMetrics.cs // This class is copied from the system metrics class in frameworks. The // reason it exists is to consolidate all system metric calls through one layer // so that maintenance from a security stand point gets easier. We will add // mertrics on a need basis. The caching code is removed since the original calls // that were moved here do not rely on caching. If there is a percieved perf. problem // we can work on enabling this. //----------------------------------------------------------------------------- using System; using System.Collections; using System.Runtime.InteropServices; using System.Windows.Media; using Microsoft.Win32; using System.Security; using System.Security.Permissions; using MS.Win32; using MS.Internal; using MS.Internal.Interop; using MS.Internal.PresentationCore; namespace MS.Win32 { ////// Contains properties that are queries into the system's various settings. /// [FriendAccessAllowed] // Built into Core, also used by Framework. internal sealed class SafeSystemMetrics { private SafeSystemMetrics() { } #if !PRESENTATION_CORE ////// Maps to SM_CXVIRTUALSCREEN /// ////// TreatAsSafe --There exists a demand /// Security Critical -- Calling UnsafeNativeMethods /// internal static int VirtualScreenWidth { [SecurityCritical,SecurityTreatAsSafe] get { SecurityHelper.DemandUnmanagedCode(); return UnsafeNativeMethods.GetSystemMetrics(SM.CXVIRTUALSCREEN); } } ////// Maps to SM_CYVIRTUALSCREEN /// ////// TreatAsSafe --There exists a demand /// Security Critical -- Calling UnsafeNativeMethods /// internal static int VirtualScreenHeight { [SecurityCritical,SecurityTreatAsSafe] get { SecurityHelper.DemandUnmanagedCode(); return UnsafeNativeMethods.GetSystemMetrics(SM.CYVIRTUALSCREEN); } } #endif //end !PRESENTATIONCORE ////// Maps to SM_CXDOUBLECLK /// ////// TreatAsSafe --This data is safe to expose /// Security Critical -- Calling UnsafeNativeMethods /// internal static int DoubleClickDeltaX { [SecurityCritical, SecurityTreatAsSafe] get { return UnsafeNativeMethods.GetSystemMetrics(SM.CXDOUBLECLK); } } ////// Maps to SM_CYDOUBLECLK /// ////// TreatAsSafe --This data is safe to expose /// Security Critical -- Calling UnsafeNativeMethods /// internal static int DoubleClickDeltaY { [SecurityCritical, SecurityTreatAsSafe] get { return UnsafeNativeMethods.GetSystemMetrics(SM.CYDOUBLECLK); } } ////// Maps to SM_CXDRAG /// ////// TreatAsSafe --This data is safe to expose /// Security Critical -- Calling UnsafeNativeMethods /// internal static int DragDeltaX { [SecurityCritical, SecurityTreatAsSafe] get { return UnsafeNativeMethods.GetSystemMetrics(SM.CXDRAG); } } ////// Maps to SM_CYDRAG /// ////// TreatAsSafe --This data is safe to expose /// Security Critical -- Calling UnsafeNativeMethods /// internal static int DragDeltaY { [SecurityCritical, SecurityTreatAsSafe] get { return UnsafeNativeMethods.GetSystemMetrics(SM.CYDRAG); } } ////// Is an IMM enabled ? Maps to SM_IMMENABLED /// //////Critical - calls a method that performs an elevation. /// TreatAsSafe - data is considered safe to expose. /// internal static bool IsImmEnabled { [SecurityCritical, SecurityTreatAsSafe] get { return (UnsafeNativeMethods.GetSystemMetrics(SM.IMMENABLED) != 0); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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