ToolStripTextBox.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / ToolStripTextBox.cs / 1305376 / ToolStripTextBox.cs

                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Windows.Forms { 
    using System; 
    using System.Drawing;
    using System.Drawing.Design; 
    using System.ComponentModel;
    using System.Diagnostics;
    using System.Windows.Forms.Layout;
    using System.Collections.Specialized; 
    using System.Runtime.InteropServices;
    using System.Windows.Forms.Design; 
    using System.Security; 
    using System.Security.Permissions;
    using Microsoft.Win32; 

    /// 
    [ToolStripItemDesignerAvailability(ToolStripItemDesignerAvailability.MenuStrip | ToolStripItemDesignerAvailability.ToolStrip | ToolStripItemDesignerAvailability.ContextMenuStrip)]
    public class ToolStripTextBox : ToolStripControlHost { 

        internal static readonly object EventTextBoxTextAlignChanged                              = new object(); 
        internal static readonly object EventAcceptsTabChanged                                    = new object(); 
        internal static readonly object EventBorderStyleChanged                                   = new object();
        internal static readonly object EventHideSelectionChanged                                 = new object(); 
        internal static readonly object EventReadOnlyChanged                                      = new object();
        internal static readonly object EventMultilineChanged                                     = new object();
        internal static readonly object EventModifiedChanged                                      = new object();
 
        /// 
        public ToolStripTextBox() : base(CreateControlInstance()) { 
            ToolStripTextBoxControl textBox = Control as ToolStripTextBoxControl; 
            textBox.Owner = this;
        } 

        public ToolStripTextBox(string name) : this() {
            this.Name = name;
        } 

        ///  
        [EditorBrowsable(EditorBrowsableState.Never)] 
        public ToolStripTextBox(Control c): base(c) {
            throw new NotSupportedException(SR.GetString(SR.ToolStripMustSupplyItsOwnTextBox)); 
        }

        [
        Browsable(false), 
        EditorBrowsable(EditorBrowsableState.Never),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        ] 
        public override Image BackgroundImage {
            get { 
                return base.BackgroundImage;
            }
            set {
                base.BackgroundImage = value; 
            }
        } 
 
        [
        Browsable(false), 
        EditorBrowsable(EditorBrowsableState.Never),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ]
        public override ImageLayout BackgroundImageLayout { 
            get {
                return base.BackgroundImageLayout; 
            } 
            set {
                base.BackgroundImageLayout = value; 
            }
        }

        ///  
        /// 
        /// Deriving classes can override this to configure a default size for their control. 
        /// This is more efficient than setting the size in the control's constructor. 
        /// 
        protected internal override Padding DefaultMargin { 
            get {
                if (IsOnDropDown) {
                    return new Padding(1);
                } 
                else {
                    return new Padding(1, 0, 1, 0); 
                } 
            }
        } 

        /// 
        protected override Size DefaultSize {
            get { 
                return  new Size(100,22);
            } 
        } 
        /// 
        [Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)] 
        public TextBox TextBox {
            get{
                return Control as TextBox;
            } 
        }
 
        private static Control CreateControlInstance() { 
            TextBox textBox = new ToolStripTextBoxControl();
            textBox.BorderStyle = BorderStyle.Fixed3D; 
            textBox.AutoSize = true;
            return textBox;
        }
 

        ///  
        public override Size GetPreferredSize(Size constrainingSize) { 
            // dont call TextBox.GPS because it will grow and shrink as the text changes.
            Rectangle bounds = CommonProperties.GetSpecifiedBounds(TextBox); 
            return new Size(bounds.Width, TextBox.PreferredHeight);
        }
        private void HandleAcceptsTabChanged(object sender, EventArgs e) {
            OnAcceptsTabChanged(e); 
        }
        private void HandleBorderStyleChanged(object sender, EventArgs e) { 
            OnBorderStyleChanged(e); 
        }
        private void HandleHideSelectionChanged(object sender, EventArgs e) { 
            OnHideSelectionChanged(e);
        }
        private void HandleModifiedChanged(object sender, EventArgs e) {
            OnModifiedChanged(e); 
        }
        private void HandleMultilineChanged(object sender, EventArgs e) { 
            OnMultilineChanged(e); 
        }
        private void HandleReadOnlyChanged(object sender, EventArgs e) { 
            OnReadOnlyChanged(e);
        }
        private void HandleTextBoxTextAlignChanged(object sender, EventArgs e) {
            RaiseEvent(EventTextBoxTextAlignChanged, e); 
        }
        ///  
        protected virtual void OnAcceptsTabChanged(EventArgs e) { 
            RaiseEvent(EventAcceptsTabChanged, e);
        } 
        /// 
        protected virtual void OnBorderStyleChanged(EventArgs e) {
            RaiseEvent(EventBorderStyleChanged, e);
        } 
        /// 
        protected virtual void OnHideSelectionChanged(EventArgs e) { 
            RaiseEvent(EventHideSelectionChanged, e); 
        }
        ///  
        protected virtual void OnModifiedChanged(EventArgs e) {
            RaiseEvent(EventModifiedChanged, e);
        }
        ///  
        protected virtual void OnMultilineChanged(EventArgs e) {
            RaiseEvent(EventMultilineChanged, e); 
        } 
        /// 
        protected virtual void OnReadOnlyChanged(EventArgs e) { 
            RaiseEvent(EventReadOnlyChanged, e);
        }

 
        /// 
        protected override void OnSubscribeControlEvents(Control control) { 
            TextBox textBox = control as TextBox; 
            if (textBox != null) {
                // Please keep this alphabetized and in [....] with Unsubscribe 
                //
                textBox.AcceptsTabChanged             += new EventHandler(HandleAcceptsTabChanged);
                textBox.BorderStyleChanged            += new EventHandler(HandleBorderStyleChanged);
                textBox.HideSelectionChanged          += new EventHandler(HandleHideSelectionChanged); 
                textBox.ModifiedChanged               += new EventHandler(HandleModifiedChanged);
                textBox.MultilineChanged              += new EventHandler(HandleMultilineChanged); 
                textBox.ReadOnlyChanged               += new EventHandler(HandleReadOnlyChanged); 
                textBox.TextAlignChanged              += new EventHandler(HandleTextBoxTextAlignChanged);
 
            }

            base.OnSubscribeControlEvents(control);
        } 

        ///  
        protected override void OnUnsubscribeControlEvents(Control control) { 

              TextBox textBox = control as TextBox; 
              if (textBox != null) {
                  // Please keep this alphabetized and in [....] with Subscribe
                  //
                  textBox.AcceptsTabChanged             -= new EventHandler(HandleAcceptsTabChanged); 
                  textBox.BorderStyleChanged            -= new EventHandler(HandleBorderStyleChanged);
                  textBox.HideSelectionChanged          -= new EventHandler(HandleHideSelectionChanged); 
                  textBox.ModifiedChanged               -= new EventHandler(HandleModifiedChanged); 
                  textBox.MultilineChanged              -= new EventHandler(HandleMultilineChanged);
                  textBox.ReadOnlyChanged               -= new EventHandler(HandleReadOnlyChanged); 
                  textBox.TextAlignChanged              -= new EventHandler(HandleTextBoxTextAlignChanged);
              }
              base.OnUnsubscribeControlEvents(control);
 
        }
 
        internal override bool ShouldSerializeFont() { 
            return Font != ToolStripManager.DefaultFont;
        } 



#region WrappedProperties 
        /// 
        [ 
         SRCategory(SR.CatBehavior), 
         DefaultValue(false),
         SRDescription(SR.TextBoxAcceptsTabDescr) 
         ]
        public bool AcceptsTab {
            get { return TextBox.AcceptsTab; }
            set { TextBox.AcceptsTab = value; } 
        }
 
        ///  
        [
        SRCategory(SR.CatBehavior), 
        DefaultValue(false),
        SRDescription(SR.TextBoxAcceptsReturnDescr)
        ]
        public bool AcceptsReturn { 
            get { return TextBox.AcceptsReturn; }
            set { TextBox.AcceptsReturn = value; } 
        } 

        ///  
        [
        DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
        Localizable(true),
        SRDescription(SR.TextBoxAutoCompleteCustomSourceDescr), 
        Editor("System.Windows.Forms.Design.ListControlStringCollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
        Browsable(true), EditorBrowsable(EditorBrowsableState.Always) 
        ] 
        public System.Windows.Forms.AutoCompleteStringCollection AutoCompleteCustomSource {
            get { return TextBox.AutoCompleteCustomSource; } 
            set { TextBox.AutoCompleteCustomSource = value; }
        }

        ///  
        [
        DefaultValue(AutoCompleteMode.None), 
        SRDescription(SR.TextBoxAutoCompleteModeDescr), 
        Browsable(true), EditorBrowsable(EditorBrowsableState.Always)
        ] 
        public AutoCompleteMode AutoCompleteMode {
            get { return TextBox.AutoCompleteMode; }
            set { TextBox.AutoCompleteMode = value; }
        } 

        ///  
        [ 
        DefaultValue(AutoCompleteSource.None),
        SRDescription(SR.TextBoxAutoCompleteSourceDescr), 
        Browsable(true), EditorBrowsable(EditorBrowsableState.Always)
        ]
        public AutoCompleteSource AutoCompleteSource {
            get { return TextBox.AutoCompleteSource; } 
            set { TextBox.AutoCompleteSource = value; }
        } 
 
        /// 
        [ 
        SRCategory(SR.CatAppearance),
        DefaultValue(BorderStyle.Fixed3D),
        DispId(NativeMethods.ActiveX.DISPID_BORDERSTYLE),
        SRDescription(SR.TextBoxBorderDescr) 
        ]
        public BorderStyle BorderStyle { 
            get { return TextBox.BorderStyle; } 
            set { TextBox.BorderStyle = value; }
        } 

        /// 
        [
        SRCategory(SR.CatBehavior), 
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        SRDescription(SR.TextBoxCanUndoDescr) 
        ]
        public bool CanUndo { 
            get { return TextBox.CanUndo; }
        }

        ///  
        [
        SRCategory(SR.CatBehavior), 
        DefaultValue(CharacterCasing.Normal), 
        SRDescription(SR.TextBoxCharacterCasingDescr)
        ] 
        public CharacterCasing CharacterCasing {
            get { return TextBox.CharacterCasing; }
            set { TextBox.CharacterCasing = value; }
        } 

        ///  
        [ 
        SRCategory(SR.CatBehavior),
        DefaultValue(true), 
        SRDescription(SR.TextBoxHideSelectionDescr)
        ]
        public bool HideSelection {
            get { return TextBox.HideSelection; } 
            set { TextBox.HideSelection = value; }
        } 
 
        /// 
        [ 
        SRCategory(SR.CatAppearance),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        Localizable(true),
        SRDescription(SR.TextBoxLinesDescr), 
        Editor("System.Windows.Forms.Design.StringArrayEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor))
        ] 
        public string[] Lines { 
            get { return TextBox.Lines; }
            set { TextBox.Lines = value; } 
        }

        /// 
        [ 
        SRCategory(SR.CatBehavior),
        DefaultValue(32767), 
        Localizable(true), 
        SRDescription(SR.TextBoxMaxLengthDescr)
        ] 
        public int MaxLength {
            get { return TextBox.MaxLength; }
            set { TextBox.MaxLength = value; }
        } 

        ///  
        [ 
        SRCategory(SR.CatBehavior),
        Browsable(false), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        SRDescription(SR.TextBoxModifiedDescr)
        ]
        public bool Modified { 
            get { return TextBox.Modified; }
            set { TextBox.Modified = value; } 
        } 

        ///  
        [
        SRCategory(SR.CatBehavior),
        DefaultValue(false),
        Localizable(true), 
        SRDescription(SR.TextBoxMultilineDescr),
        RefreshProperties(RefreshProperties.All), 
        Browsable(false),EditorBrowsable(EditorBrowsableState.Never) 
        ]
        public bool Multiline { 
            get { return TextBox.Multiline; }
            set { TextBox.Multiline = value; }
        }
 
        /// 
        [ 
        SRCategory(SR.CatBehavior), 
        DefaultValue(false),
        SRDescription(SR.TextBoxReadOnlyDescr) 
        ]
        public bool ReadOnly {
            get { return TextBox.ReadOnly; }
            set { TextBox.ReadOnly = value; } 
        }
        ///  
        [ 
        SRCategory(SR.CatAppearance),
        Browsable(false), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        SRDescription(SR.TextBoxSelectedTextDescr)
        ]
        public string SelectedText { 
            get { return TextBox.SelectedText; }
            set { TextBox.SelectedText = value; } 
        } 

        ///  
        [
        SRCategory(SR.CatAppearance),
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        SRDescription(SR.TextBoxSelectionLengthDescr)
        ] 
        public int SelectionLength { 
            get { return TextBox.SelectionLength; }
            set { TextBox.SelectionLength = value; } 
        }
        /// 
        [
        SRCategory(SR.CatAppearance), 
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        SRDescription(SR.TextBoxSelectionStartDescr) 
        ]
        public int SelectionStart { 
            get { return TextBox.SelectionStart; }
            set { TextBox.SelectionStart = value; }
        }
        ///  
        [
        SRCategory(SR.CatBehavior), 
        DefaultValue(true), 
        SRDescription(SR.TextBoxShortcutsEnabledDescr)
        ] 
        public bool ShortcutsEnabled {
            get { return TextBox.ShortcutsEnabled; }
            set { TextBox.ShortcutsEnabled = value; }
        } 
        /// 
        [Browsable(false)] 
        public int TextLength { 
            get { return TextBox.TextLength; }
        } 

        [
        Localizable(true),
        SRCategory(SR.CatAppearance), 
        DefaultValue(HorizontalAlignment.Left),
        SRDescription(SR.TextBoxTextAlignDescr) 
        ] 
        public HorizontalAlignment TextBoxTextAlign {
            get { return TextBox.TextAlign; } 
            set { TextBox.TextAlign = value; }
        }

        ///  
        [
        SRCategory(SR.CatBehavior), 
        Localizable(true), 
        DefaultValue(true),
        SRDescription(SR.TextBoxWordWrapDescr), 
        Browsable(false),EditorBrowsable(EditorBrowsableState.Never)
        ]
        public bool WordWrap {
            get { return TextBox.WordWrap; } 
            set { TextBox.WordWrap = value; }
        } 
 

#endregion WrappedProperties 



#region WrappedEvents 
       /// 
       [SRCategory(SR.CatPropertyChanged), SRDescription(SR.TextBoxBaseOnAcceptsTabChangedDescr)] 
       public event EventHandler AcceptsTabChanged { 
            add {
                Events.AddHandler(EventAcceptsTabChanged, value); 
            }
            remove {
                Events.RemoveHandler(EventAcceptsTabChanged, value);
            } 
        }
 
 
        /// 
        [SRCategory(SR.CatPropertyChanged), SRDescription(SR.TextBoxBaseOnBorderStyleChangedDescr)] 
        public event EventHandler BorderStyleChanged {
            add {
                Events.AddHandler(EventBorderStyleChanged, value);
            } 
            remove {
                Events.RemoveHandler(EventBorderStyleChanged, value); 
            } 
        }
 
        /// 
        [SRCategory(SR.CatPropertyChanged), SRDescription(SR.TextBoxBaseOnHideSelectionChangedDescr)]
        public event EventHandler HideSelectionChanged {
            add { 
                Events.AddHandler(EventHideSelectionChanged, value);
            } 
            remove { 
                Events.RemoveHandler(EventHideSelectionChanged, value);
            } 
        }

        /// 
        [SRCategory(SR.CatPropertyChanged), SRDescription(SR.TextBoxBaseOnModifiedChangedDescr)] 
        public event EventHandler ModifiedChanged {
            add { 
                Events.AddHandler(EventModifiedChanged, value); 
            }
            remove { 
                Events.RemoveHandler(EventModifiedChanged, value);
            }
        }
 
        /// 
        [SRCategory(SR.CatPropertyChanged), SRDescription(SR.TextBoxBaseOnMultilineChangedDescr),Browsable(false),EditorBrowsable(EditorBrowsableState.Never)] 
        public event EventHandler MultilineChanged { 
           add {
               Events.AddHandler(EventMultilineChanged, value); 
           }
           remove {
               Events.RemoveHandler(EventMultilineChanged, value);
           } 
        }
 
        ///  
        [SRCategory(SR.CatPropertyChanged), SRDescription(SR.TextBoxBaseOnReadOnlyChangedDescr)]
        public event EventHandler ReadOnlyChanged { 
           add {
               Events.AddHandler(EventReadOnlyChanged, value);
           }
           remove { 
               Events.RemoveHandler(EventReadOnlyChanged, value);
           } 
        } 

 
        /// 
        [SRCategory(SR.CatPropertyChanged), SRDescription(SR.ToolStripTextBoxTextBoxTextAlignChangedDescr)]
        public event EventHandler TextBoxTextAlignChanged {
            add { 
                Events.AddHandler(EventTextBoxTextAlignChanged, value);
            } 
            remove { 
                Events.RemoveHandler(EventTextBoxTextAlignChanged, value);
            } 
        }
#endregion WrappedEvents

#region WrappedMethods 
       /// 
       public void AppendText(string text) { TextBox.AppendText(text); } 
       ///  
       public void Clear(){ TextBox.Clear(); }
       ///  
       public void ClearUndo() {TextBox.ClearUndo(); }
       /// 
       public void Copy() {TextBox.Copy(); }
       ///  
       public void Cut() {TextBox.Copy(); }
       ///  
       public void DeselectAll() { TextBox.DeselectAll(); } 
       /// 
       public char GetCharFromPosition(System.Drawing.Point pt) { return TextBox.GetCharFromPosition(pt); } 
       /// 
       public int GetCharIndexFromPosition(System.Drawing.Point pt) { return TextBox.GetCharIndexFromPosition(pt); }
       /// 
       public int GetFirstCharIndexFromLine(int lineNumber) { return TextBox.GetFirstCharIndexFromLine(lineNumber); } 
       /// 
       public int GetFirstCharIndexOfCurrentLine() { return TextBox.GetFirstCharIndexOfCurrentLine(); } 
       ///  
       public int GetLineFromCharIndex(int index) { return TextBox.GetLineFromCharIndex(index); }
       ///  
       public System.Drawing.Point GetPositionFromCharIndex(int index) { return TextBox.GetPositionFromCharIndex(index); }
       /// 
       public void Paste() {  TextBox.Paste(); }
       ///  
       public void ScrollToCaret() {  TextBox.ScrollToCaret(); }
       ///  
       public void Select(int start, int length) {  TextBox.Select(start, length); } 
       /// 
       public void SelectAll() { TextBox.SelectAll(); } 
       /// 
       public void Undo() {  TextBox.Undo(); }
#endregion
        private class ToolStripTextBoxControl : TextBox { 
                private bool mouseIsOver = false;
                private ToolStripTextBox ownerItem; 
                private bool isFontSet = true; 
                private int numberHooked;
 
               [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1805:DoNotInitializeUnnecessarily")]  // FXCop doesnt understand that setting Font changes the value of isFontSet
                public ToolStripTextBoxControl() {
                    // required to make the text box height match the combo.
                    this.Font = ToolStripManager.DefaultFont; 
                    isFontSet = false;
                } 
 

                // returns the distance from the client rect to the upper left hand corner of the control 
                private NativeMethods.RECT AbsoluteClientRECT {
                    get {
                        NativeMethods.RECT rect = new NativeMethods.RECT();
                        CreateParams cp = CreateParams; 

                        SafeNativeMethods.AdjustWindowRectEx(ref rect, cp.Style, HasMenu, cp.ExStyle); 
 
                        // the coordinates we get back are negative, we need to translate this back to positive.
                        int offsetX = -rect.left; // one to get back to 0,0, another to translate 
                        int offsetY = -rect.top;

                        // fetch the client rect, then apply the offset.
                        UnsafeNativeMethods.GetClientRect(new HandleRef(this, this.Handle), ref rect); 

                        rect.left   += offsetX; 
                        rect.right  += offsetX; 
                        rect.top    += offsetY;
                        rect.bottom += offsetY; 

                        return rect;
                    }
                } 
                private Rectangle AbsoluteClientRectangle {
                    get { 
                        NativeMethods.RECT rect = AbsoluteClientRECT; 
                        return Rectangle.FromLTRB(rect.top, rect.top, rect.right, rect.bottom);
                    } 
                }


                private ProfessionalColorTable ColorTable { 
                     get {
                         if (Owner != null) { 
                             ToolStripProfessionalRenderer renderer = Owner.Renderer as ToolStripProfessionalRenderer; 
                             if (renderer != null) {
                                 return renderer.ColorTable; 
                             }
                         }
                         return ProfessionalColors.ColorTable;
                     } 
                }
 
                private bool IsPopupTextBox { 
                   get {
                        return ((BorderStyle == BorderStyle.Fixed3D) && 
                                 (Owner != null && (Owner.Renderer is ToolStripProfessionalRenderer)));
                    }
                }
 
                internal bool MouseIsOver {
                    get { return mouseIsOver; } 
                    set { 
                        if (mouseIsOver != value) {
                            mouseIsOver = value; 
                            if (!Focused) {
                                InvalidateNonClient();
                            }
                        } 
                    }
                } 
 
                public override Font Font {
                    get { return base.Font; } 
                    set {
                        base.Font = value;
                        isFontSet = ShouldSerializeFont();
                    } 
                }
 
                public ToolStripTextBox Owner { 
                   get { return ownerItem; }
                   set { ownerItem = value; } 
                }

                private void InvalidateNonClient() {
                    if (!IsPopupTextBox) { 
                        return;
                    } 
                    NativeMethods.RECT absoluteClientRectangle = AbsoluteClientRECT; 
                    HandleRef hNonClientRegion = NativeMethods.NullHandleRef;
                    HandleRef hClientRegion = NativeMethods.NullHandleRef; 
                    HandleRef hTotalRegion = NativeMethods.NullHandleRef;

                    try {
                        // get the total client area, then exclude the client by using XOR 
                        hTotalRegion = new HandleRef(this, SafeNativeMethods.CreateRectRgn(0, 0, this.Width, this.Height));
                        hClientRegion = new HandleRef(this, SafeNativeMethods.CreateRectRgn(absoluteClientRectangle.left, absoluteClientRectangle.top, absoluteClientRectangle.right, absoluteClientRectangle.bottom)); 
                        hNonClientRegion = new HandleRef(this, SafeNativeMethods.CreateRectRgn(0,0,0,0)); 

                        SafeNativeMethods.CombineRgn(hNonClientRegion, hTotalRegion, hClientRegion, NativeMethods.RGN_XOR); 

                        // Call RedrawWindow with the region.
                        NativeMethods.RECT ignored = new NativeMethods.RECT();
                        SafeNativeMethods.RedrawWindow(new HandleRef(this, Handle), 
                                                       ref ignored , hNonClientRegion,
                                                       NativeMethods.RDW_INVALIDATE | NativeMethods.RDW_ERASE | 
                                                       NativeMethods.RDW_UPDATENOW  | NativeMethods.RDW_ERASENOW   | 
                                                       NativeMethods.RDW_FRAME);
                    } 
                    finally {
                        // clean up our regions.
                        try {
                            if (hNonClientRegion.Handle != IntPtr.Zero) { 
                                SafeNativeMethods.DeleteObject(hNonClientRegion);
                            } 
                        } 
                        finally {
                            try { 
                                if (hClientRegion.Handle != IntPtr.Zero) {
                                    SafeNativeMethods.DeleteObject(hClientRegion);
                                }
                            } 
                            finally {
                                if (hTotalRegion.Handle != IntPtr.Zero) { 
                                    SafeNativeMethods.DeleteObject(hTotalRegion); 
                                }
                            } 
                        }

                    }
 
                }
 
                protected override void OnGotFocus(EventArgs e) { 
                    base.OnGotFocus(e);
                    InvalidateNonClient(); 
                }

                protected override void OnLostFocus(EventArgs e) {
                    base.OnLostFocus(e); 
                    InvalidateNonClient();
 
                } 

                protected override void OnMouseEnter(EventArgs e) { 
                    base.OnMouseEnter(e);
                    MouseIsOver = true;

                } 

                protected override void OnMouseLeave(EventArgs e) { 
                    base.OnMouseLeave(e); 
                    MouseIsOver = false;
                } 


                private void HookStaticEvents(bool hook) {
                   if (hook) { 
                      try {
                         SystemEvents.UserPreferenceChanged += new UserPreferenceChangedEventHandler(OnUserPreferenceChanged); 
                     } 
                     finally{
                         numberHooked++; 
                     }
                   }
                   else if (numberHooked > 0) {
                        try { 
                            SystemEvents.UserPreferenceChanged -= new UserPreferenceChangedEventHandler(OnUserPreferenceChanged);
                        } 
                        finally { 
                            numberHooked--;
                        } 
                   }

                }
                private void OnUserPreferenceChanged(object sender, UserPreferenceChangedEventArgs e) { 
                    if (e.Category == UserPreferenceCategory.Window) {
                        if (!isFontSet) { 
                            this.Font = ToolStripManager.DefaultFont; 
                        }
                    } 
                }

                protected override void OnVisibleChanged(EventArgs e) {
                    base.OnVisibleChanged(e); 
                    if (!Disposing && !IsDisposed) {
                        HookStaticEvents(Visible); 
                    } 
                }
 
                protected override void Dispose(bool disposing) {
                    if(disposing) {
                        HookStaticEvents(false);
                    } 
                    base.Dispose(disposing);
                } 
 
                private void WmNCPaint(ref Message m) {
 
                    if (!IsPopupTextBox) {
                        base.WndProc(ref m);
                        return;
                    } 

                    // Paint over the edges of the text box. 
 
                    // Using GetWindowDC instead of GetDCEx as GetDCEx seems to return a null handle and a last error of
                    // the operation succeeded.  We're not going to use the clipping rect anyways - so it's not 
                    // that bigga deal.
                    HandleRef hdc = new HandleRef(this, UnsafeNativeMethods.GetWindowDC(new HandleRef(this,m.HWnd)));
                    if (hdc.Handle == IntPtr.Zero) {
                        throw new Win32Exception(); 
                    }
                    try { 
                        // Dont set the clipping region based on the WParam - windows seems to hack out the two pixels 
                        // intended for the non-client border.
 
                        Color outerBorderColor = (MouseIsOver || Focused) ? ColorTable.TextBoxBorder : this.BackColor;
                        Color innerBorderColor = this.BackColor;

                        if (!Enabled) { 
                            outerBorderColor = SystemColors.ControlDark;
                            innerBorderColor = SystemColors.Control; 
                        } 
                        using (Graphics g = Graphics.FromHdcInternal(hdc.Handle)) {
 
                            Rectangle clientRect = AbsoluteClientRectangle;

                            // could have set up a clip and fill-rectangled, thought this would be faster.
                            using (Brush b = new SolidBrush(innerBorderColor)) { 
                                g.FillRectangle(b, 0, 0, this.Width, clientRect.Top); // top border
                                g.FillRectangle(b, 0, 0, clientRect.Left, this.Height); // left border 
                                g.FillRectangle(b, 0, clientRect.Bottom, this.Width, this.Height - clientRect.Height); // bottom border 
                                g.FillRectangle(b, clientRect.Right, 0, this.Width - clientRect.Right, this.Height); // right border
                            } 

                            // paint the outside rect.
                            using (Pen p = new Pen(outerBorderColor)) {
                                g.DrawRectangle(p, 0, 0, this.Width - 1, this.Height - 1); 
                            }
 
                        } 
                    }
                    finally { 
                        UnsafeNativeMethods.ReleaseDC(new HandleRef(this, this.Handle),hdc);
                    }
                    // we've handled WM_NCPAINT.
                    m.Result = IntPtr.Zero; 

                } 
                protected override void WndProc(ref Message m) { 
                    if (m.Msg == NativeMethods.WM_NCPAINT) {
                        WmNCPaint(ref m); 
                        return;
                    }
                    else {
                        base.WndProc(ref m); 
                    }
                } 
        } 

 
    }

}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Windows.Forms { 
    using System; 
    using System.Drawing;
    using System.Drawing.Design; 
    using System.ComponentModel;
    using System.Diagnostics;
    using System.Windows.Forms.Layout;
    using System.Collections.Specialized; 
    using System.Runtime.InteropServices;
    using System.Windows.Forms.Design; 
    using System.Security; 
    using System.Security.Permissions;
    using Microsoft.Win32; 

    /// 
    [ToolStripItemDesignerAvailability(ToolStripItemDesignerAvailability.MenuStrip | ToolStripItemDesignerAvailability.ToolStrip | ToolStripItemDesignerAvailability.ContextMenuStrip)]
    public class ToolStripTextBox : ToolStripControlHost { 

        internal static readonly object EventTextBoxTextAlignChanged                              = new object(); 
        internal static readonly object EventAcceptsTabChanged                                    = new object(); 
        internal static readonly object EventBorderStyleChanged                                   = new object();
        internal static readonly object EventHideSelectionChanged                                 = new object(); 
        internal static readonly object EventReadOnlyChanged                                      = new object();
        internal static readonly object EventMultilineChanged                                     = new object();
        internal static readonly object EventModifiedChanged                                      = new object();
 
        /// 
        public ToolStripTextBox() : base(CreateControlInstance()) { 
            ToolStripTextBoxControl textBox = Control as ToolStripTextBoxControl; 
            textBox.Owner = this;
        } 

        public ToolStripTextBox(string name) : this() {
            this.Name = name;
        } 

        ///  
        [EditorBrowsable(EditorBrowsableState.Never)] 
        public ToolStripTextBox(Control c): base(c) {
            throw new NotSupportedException(SR.GetString(SR.ToolStripMustSupplyItsOwnTextBox)); 
        }

        [
        Browsable(false), 
        EditorBrowsable(EditorBrowsableState.Never),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        ] 
        public override Image BackgroundImage {
            get { 
                return base.BackgroundImage;
            }
            set {
                base.BackgroundImage = value; 
            }
        } 
 
        [
        Browsable(false), 
        EditorBrowsable(EditorBrowsableState.Never),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ]
        public override ImageLayout BackgroundImageLayout { 
            get {
                return base.BackgroundImageLayout; 
            } 
            set {
                base.BackgroundImageLayout = value; 
            }
        }

        ///  
        /// 
        /// Deriving classes can override this to configure a default size for their control. 
        /// This is more efficient than setting the size in the control's constructor. 
        /// 
        protected internal override Padding DefaultMargin { 
            get {
                if (IsOnDropDown) {
                    return new Padding(1);
                } 
                else {
                    return new Padding(1, 0, 1, 0); 
                } 
            }
        } 

        /// 
        protected override Size DefaultSize {
            get { 
                return  new Size(100,22);
            } 
        } 
        /// 
        [Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)] 
        public TextBox TextBox {
            get{
                return Control as TextBox;
            } 
        }
 
        private static Control CreateControlInstance() { 
            TextBox textBox = new ToolStripTextBoxControl();
            textBox.BorderStyle = BorderStyle.Fixed3D; 
            textBox.AutoSize = true;
            return textBox;
        }
 

        ///  
        public override Size GetPreferredSize(Size constrainingSize) { 
            // dont call TextBox.GPS because it will grow and shrink as the text changes.
            Rectangle bounds = CommonProperties.GetSpecifiedBounds(TextBox); 
            return new Size(bounds.Width, TextBox.PreferredHeight);
        }
        private void HandleAcceptsTabChanged(object sender, EventArgs e) {
            OnAcceptsTabChanged(e); 
        }
        private void HandleBorderStyleChanged(object sender, EventArgs e) { 
            OnBorderStyleChanged(e); 
        }
        private void HandleHideSelectionChanged(object sender, EventArgs e) { 
            OnHideSelectionChanged(e);
        }
        private void HandleModifiedChanged(object sender, EventArgs e) {
            OnModifiedChanged(e); 
        }
        private void HandleMultilineChanged(object sender, EventArgs e) { 
            OnMultilineChanged(e); 
        }
        private void HandleReadOnlyChanged(object sender, EventArgs e) { 
            OnReadOnlyChanged(e);
        }
        private void HandleTextBoxTextAlignChanged(object sender, EventArgs e) {
            RaiseEvent(EventTextBoxTextAlignChanged, e); 
        }
        ///  
        protected virtual void OnAcceptsTabChanged(EventArgs e) { 
            RaiseEvent(EventAcceptsTabChanged, e);
        } 
        /// 
        protected virtual void OnBorderStyleChanged(EventArgs e) {
            RaiseEvent(EventBorderStyleChanged, e);
        } 
        /// 
        protected virtual void OnHideSelectionChanged(EventArgs e) { 
            RaiseEvent(EventHideSelectionChanged, e); 
        }
        ///  
        protected virtual void OnModifiedChanged(EventArgs e) {
            RaiseEvent(EventModifiedChanged, e);
        }
        ///  
        protected virtual void OnMultilineChanged(EventArgs e) {
            RaiseEvent(EventMultilineChanged, e); 
        } 
        /// 
        protected virtual void OnReadOnlyChanged(EventArgs e) { 
            RaiseEvent(EventReadOnlyChanged, e);
        }

 
        /// 
        protected override void OnSubscribeControlEvents(Control control) { 
            TextBox textBox = control as TextBox; 
            if (textBox != null) {
                // Please keep this alphabetized and in [....] with Unsubscribe 
                //
                textBox.AcceptsTabChanged             += new EventHandler(HandleAcceptsTabChanged);
                textBox.BorderStyleChanged            += new EventHandler(HandleBorderStyleChanged);
                textBox.HideSelectionChanged          += new EventHandler(HandleHideSelectionChanged); 
                textBox.ModifiedChanged               += new EventHandler(HandleModifiedChanged);
                textBox.MultilineChanged              += new EventHandler(HandleMultilineChanged); 
                textBox.ReadOnlyChanged               += new EventHandler(HandleReadOnlyChanged); 
                textBox.TextAlignChanged              += new EventHandler(HandleTextBoxTextAlignChanged);
 
            }

            base.OnSubscribeControlEvents(control);
        } 

        ///  
        protected override void OnUnsubscribeControlEvents(Control control) { 

              TextBox textBox = control as TextBox; 
              if (textBox != null) {
                  // Please keep this alphabetized and in [....] with Subscribe
                  //
                  textBox.AcceptsTabChanged             -= new EventHandler(HandleAcceptsTabChanged); 
                  textBox.BorderStyleChanged            -= new EventHandler(HandleBorderStyleChanged);
                  textBox.HideSelectionChanged          -= new EventHandler(HandleHideSelectionChanged); 
                  textBox.ModifiedChanged               -= new EventHandler(HandleModifiedChanged); 
                  textBox.MultilineChanged              -= new EventHandler(HandleMultilineChanged);
                  textBox.ReadOnlyChanged               -= new EventHandler(HandleReadOnlyChanged); 
                  textBox.TextAlignChanged              -= new EventHandler(HandleTextBoxTextAlignChanged);
              }
              base.OnUnsubscribeControlEvents(control);
 
        }
 
        internal override bool ShouldSerializeFont() { 
            return Font != ToolStripManager.DefaultFont;
        } 



#region WrappedProperties 
        /// 
        [ 
         SRCategory(SR.CatBehavior), 
         DefaultValue(false),
         SRDescription(SR.TextBoxAcceptsTabDescr) 
         ]
        public bool AcceptsTab {
            get { return TextBox.AcceptsTab; }
            set { TextBox.AcceptsTab = value; } 
        }
 
        ///  
        [
        SRCategory(SR.CatBehavior), 
        DefaultValue(false),
        SRDescription(SR.TextBoxAcceptsReturnDescr)
        ]
        public bool AcceptsReturn { 
            get { return TextBox.AcceptsReturn; }
            set { TextBox.AcceptsReturn = value; } 
        } 

        ///  
        [
        DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
        Localizable(true),
        SRDescription(SR.TextBoxAutoCompleteCustomSourceDescr), 
        Editor("System.Windows.Forms.Design.ListControlStringCollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
        Browsable(true), EditorBrowsable(EditorBrowsableState.Always) 
        ] 
        public System.Windows.Forms.AutoCompleteStringCollection AutoCompleteCustomSource {
            get { return TextBox.AutoCompleteCustomSource; } 
            set { TextBox.AutoCompleteCustomSource = value; }
        }

        ///  
        [
        DefaultValue(AutoCompleteMode.None), 
        SRDescription(SR.TextBoxAutoCompleteModeDescr), 
        Browsable(true), EditorBrowsable(EditorBrowsableState.Always)
        ] 
        public AutoCompleteMode AutoCompleteMode {
            get { return TextBox.AutoCompleteMode; }
            set { TextBox.AutoCompleteMode = value; }
        } 

        ///  
        [ 
        DefaultValue(AutoCompleteSource.None),
        SRDescription(SR.TextBoxAutoCompleteSourceDescr), 
        Browsable(true), EditorBrowsable(EditorBrowsableState.Always)
        ]
        public AutoCompleteSource AutoCompleteSource {
            get { return TextBox.AutoCompleteSource; } 
            set { TextBox.AutoCompleteSource = value; }
        } 
 
        /// 
        [ 
        SRCategory(SR.CatAppearance),
        DefaultValue(BorderStyle.Fixed3D),
        DispId(NativeMethods.ActiveX.DISPID_BORDERSTYLE),
        SRDescription(SR.TextBoxBorderDescr) 
        ]
        public BorderStyle BorderStyle { 
            get { return TextBox.BorderStyle; } 
            set { TextBox.BorderStyle = value; }
        } 

        /// 
        [
        SRCategory(SR.CatBehavior), 
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        SRDescription(SR.TextBoxCanUndoDescr) 
        ]
        public bool CanUndo { 
            get { return TextBox.CanUndo; }
        }

        ///  
        [
        SRCategory(SR.CatBehavior), 
        DefaultValue(CharacterCasing.Normal), 
        SRDescription(SR.TextBoxCharacterCasingDescr)
        ] 
        public CharacterCasing CharacterCasing {
            get { return TextBox.CharacterCasing; }
            set { TextBox.CharacterCasing = value; }
        } 

        ///  
        [ 
        SRCategory(SR.CatBehavior),
        DefaultValue(true), 
        SRDescription(SR.TextBoxHideSelectionDescr)
        ]
        public bool HideSelection {
            get { return TextBox.HideSelection; } 
            set { TextBox.HideSelection = value; }
        } 
 
        /// 
        [ 
        SRCategory(SR.CatAppearance),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        Localizable(true),
        SRDescription(SR.TextBoxLinesDescr), 
        Editor("System.Windows.Forms.Design.StringArrayEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor))
        ] 
        public string[] Lines { 
            get { return TextBox.Lines; }
            set { TextBox.Lines = value; } 
        }

        /// 
        [ 
        SRCategory(SR.CatBehavior),
        DefaultValue(32767), 
        Localizable(true), 
        SRDescription(SR.TextBoxMaxLengthDescr)
        ] 
        public int MaxLength {
            get { return TextBox.MaxLength; }
            set { TextBox.MaxLength = value; }
        } 

        ///  
        [ 
        SRCategory(SR.CatBehavior),
        Browsable(false), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        SRDescription(SR.TextBoxModifiedDescr)
        ]
        public bool Modified { 
            get { return TextBox.Modified; }
            set { TextBox.Modified = value; } 
        } 

        ///  
        [
        SRCategory(SR.CatBehavior),
        DefaultValue(false),
        Localizable(true), 
        SRDescription(SR.TextBoxMultilineDescr),
        RefreshProperties(RefreshProperties.All), 
        Browsable(false),EditorBrowsable(EditorBrowsableState.Never) 
        ]
        public bool Multiline { 
            get { return TextBox.Multiline; }
            set { TextBox.Multiline = value; }
        }
 
        /// 
        [ 
        SRCategory(SR.CatBehavior), 
        DefaultValue(false),
        SRDescription(SR.TextBoxReadOnlyDescr) 
        ]
        public bool ReadOnly {
            get { return TextBox.ReadOnly; }
            set { TextBox.ReadOnly = value; } 
        }
        ///  
        [ 
        SRCategory(SR.CatAppearance),
        Browsable(false), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        SRDescription(SR.TextBoxSelectedTextDescr)
        ]
        public string SelectedText { 
            get { return TextBox.SelectedText; }
            set { TextBox.SelectedText = value; } 
        } 

        ///  
        [
        SRCategory(SR.CatAppearance),
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        SRDescription(SR.TextBoxSelectionLengthDescr)
        ] 
        public int SelectionLength { 
            get { return TextBox.SelectionLength; }
            set { TextBox.SelectionLength = value; } 
        }
        /// 
        [
        SRCategory(SR.CatAppearance), 
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        SRDescription(SR.TextBoxSelectionStartDescr) 
        ]
        public int SelectionStart { 
            get { return TextBox.SelectionStart; }
            set { TextBox.SelectionStart = value; }
        }
        ///  
        [
        SRCategory(SR.CatBehavior), 
        DefaultValue(true), 
        SRDescription(SR.TextBoxShortcutsEnabledDescr)
        ] 
        public bool ShortcutsEnabled {
            get { return TextBox.ShortcutsEnabled; }
            set { TextBox.ShortcutsEnabled = value; }
        } 
        /// 
        [Browsable(false)] 
        public int TextLength { 
            get { return TextBox.TextLength; }
        } 

        [
        Localizable(true),
        SRCategory(SR.CatAppearance), 
        DefaultValue(HorizontalAlignment.Left),
        SRDescription(SR.TextBoxTextAlignDescr) 
        ] 
        public HorizontalAlignment TextBoxTextAlign {
            get { return TextBox.TextAlign; } 
            set { TextBox.TextAlign = value; }
        }

        ///  
        [
        SRCategory(SR.CatBehavior), 
        Localizable(true), 
        DefaultValue(true),
        SRDescription(SR.TextBoxWordWrapDescr), 
        Browsable(false),EditorBrowsable(EditorBrowsableState.Never)
        ]
        public bool WordWrap {
            get { return TextBox.WordWrap; } 
            set { TextBox.WordWrap = value; }
        } 
 

#endregion WrappedProperties 



#region WrappedEvents 
       /// 
       [SRCategory(SR.CatPropertyChanged), SRDescription(SR.TextBoxBaseOnAcceptsTabChangedDescr)] 
       public event EventHandler AcceptsTabChanged { 
            add {
                Events.AddHandler(EventAcceptsTabChanged, value); 
            }
            remove {
                Events.RemoveHandler(EventAcceptsTabChanged, value);
            } 
        }
 
 
        /// 
        [SRCategory(SR.CatPropertyChanged), SRDescription(SR.TextBoxBaseOnBorderStyleChangedDescr)] 
        public event EventHandler BorderStyleChanged {
            add {
                Events.AddHandler(EventBorderStyleChanged, value);
            } 
            remove {
                Events.RemoveHandler(EventBorderStyleChanged, value); 
            } 
        }
 
        /// 
        [SRCategory(SR.CatPropertyChanged), SRDescription(SR.TextBoxBaseOnHideSelectionChangedDescr)]
        public event EventHandler HideSelectionChanged {
            add { 
                Events.AddHandler(EventHideSelectionChanged, value);
            } 
            remove { 
                Events.RemoveHandler(EventHideSelectionChanged, value);
            } 
        }

        /// 
        [SRCategory(SR.CatPropertyChanged), SRDescription(SR.TextBoxBaseOnModifiedChangedDescr)] 
        public event EventHandler ModifiedChanged {
            add { 
                Events.AddHandler(EventModifiedChanged, value); 
            }
            remove { 
                Events.RemoveHandler(EventModifiedChanged, value);
            }
        }
 
        /// 
        [SRCategory(SR.CatPropertyChanged), SRDescription(SR.TextBoxBaseOnMultilineChangedDescr),Browsable(false),EditorBrowsable(EditorBrowsableState.Never)] 
        public event EventHandler MultilineChanged { 
           add {
               Events.AddHandler(EventMultilineChanged, value); 
           }
           remove {
               Events.RemoveHandler(EventMultilineChanged, value);
           } 
        }
 
        ///  
        [SRCategory(SR.CatPropertyChanged), SRDescription(SR.TextBoxBaseOnReadOnlyChangedDescr)]
        public event EventHandler ReadOnlyChanged { 
           add {
               Events.AddHandler(EventReadOnlyChanged, value);
           }
           remove { 
               Events.RemoveHandler(EventReadOnlyChanged, value);
           } 
        } 

 
        /// 
        [SRCategory(SR.CatPropertyChanged), SRDescription(SR.ToolStripTextBoxTextBoxTextAlignChangedDescr)]
        public event EventHandler TextBoxTextAlignChanged {
            add { 
                Events.AddHandler(EventTextBoxTextAlignChanged, value);
            } 
            remove { 
                Events.RemoveHandler(EventTextBoxTextAlignChanged, value);
            } 
        }
#endregion WrappedEvents

#region WrappedMethods 
       /// 
       public void AppendText(string text) { TextBox.AppendText(text); } 
       ///  
       public void Clear(){ TextBox.Clear(); }
       ///  
       public void ClearUndo() {TextBox.ClearUndo(); }
       /// 
       public void Copy() {TextBox.Copy(); }
       ///  
       public void Cut() {TextBox.Copy(); }
       ///  
       public void DeselectAll() { TextBox.DeselectAll(); } 
       /// 
       public char GetCharFromPosition(System.Drawing.Point pt) { return TextBox.GetCharFromPosition(pt); } 
       /// 
       public int GetCharIndexFromPosition(System.Drawing.Point pt) { return TextBox.GetCharIndexFromPosition(pt); }
       /// 
       public int GetFirstCharIndexFromLine(int lineNumber) { return TextBox.GetFirstCharIndexFromLine(lineNumber); } 
       /// 
       public int GetFirstCharIndexOfCurrentLine() { return TextBox.GetFirstCharIndexOfCurrentLine(); } 
       ///  
       public int GetLineFromCharIndex(int index) { return TextBox.GetLineFromCharIndex(index); }
       ///  
       public System.Drawing.Point GetPositionFromCharIndex(int index) { return TextBox.GetPositionFromCharIndex(index); }
       /// 
       public void Paste() {  TextBox.Paste(); }
       ///  
       public void ScrollToCaret() {  TextBox.ScrollToCaret(); }
       ///  
       public void Select(int start, int length) {  TextBox.Select(start, length); } 
       /// 
       public void SelectAll() { TextBox.SelectAll(); } 
       /// 
       public void Undo() {  TextBox.Undo(); }
#endregion
        private class ToolStripTextBoxControl : TextBox { 
                private bool mouseIsOver = false;
                private ToolStripTextBox ownerItem; 
                private bool isFontSet = true; 
                private int numberHooked;
 
               [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1805:DoNotInitializeUnnecessarily")]  // FXCop doesnt understand that setting Font changes the value of isFontSet
                public ToolStripTextBoxControl() {
                    // required to make the text box height match the combo.
                    this.Font = ToolStripManager.DefaultFont; 
                    isFontSet = false;
                } 
 

                // returns the distance from the client rect to the upper left hand corner of the control 
                private NativeMethods.RECT AbsoluteClientRECT {
                    get {
                        NativeMethods.RECT rect = new NativeMethods.RECT();
                        CreateParams cp = CreateParams; 

                        SafeNativeMethods.AdjustWindowRectEx(ref rect, cp.Style, HasMenu, cp.ExStyle); 
 
                        // the coordinates we get back are negative, we need to translate this back to positive.
                        int offsetX = -rect.left; // one to get back to 0,0, another to translate 
                        int offsetY = -rect.top;

                        // fetch the client rect, then apply the offset.
                        UnsafeNativeMethods.GetClientRect(new HandleRef(this, this.Handle), ref rect); 

                        rect.left   += offsetX; 
                        rect.right  += offsetX; 
                        rect.top    += offsetY;
                        rect.bottom += offsetY; 

                        return rect;
                    }
                } 
                private Rectangle AbsoluteClientRectangle {
                    get { 
                        NativeMethods.RECT rect = AbsoluteClientRECT; 
                        return Rectangle.FromLTRB(rect.top, rect.top, rect.right, rect.bottom);
                    } 
                }


                private ProfessionalColorTable ColorTable { 
                     get {
                         if (Owner != null) { 
                             ToolStripProfessionalRenderer renderer = Owner.Renderer as ToolStripProfessionalRenderer; 
                             if (renderer != null) {
                                 return renderer.ColorTable; 
                             }
                         }
                         return ProfessionalColors.ColorTable;
                     } 
                }
 
                private bool IsPopupTextBox { 
                   get {
                        return ((BorderStyle == BorderStyle.Fixed3D) && 
                                 (Owner != null && (Owner.Renderer is ToolStripProfessionalRenderer)));
                    }
                }
 
                internal bool MouseIsOver {
                    get { return mouseIsOver; } 
                    set { 
                        if (mouseIsOver != value) {
                            mouseIsOver = value; 
                            if (!Focused) {
                                InvalidateNonClient();
                            }
                        } 
                    }
                } 
 
                public override Font Font {
                    get { return base.Font; } 
                    set {
                        base.Font = value;
                        isFontSet = ShouldSerializeFont();
                    } 
                }
 
                public ToolStripTextBox Owner { 
                   get { return ownerItem; }
                   set { ownerItem = value; } 
                }

                private void InvalidateNonClient() {
                    if (!IsPopupTextBox) { 
                        return;
                    } 
                    NativeMethods.RECT absoluteClientRectangle = AbsoluteClientRECT; 
                    HandleRef hNonClientRegion = NativeMethods.NullHandleRef;
                    HandleRef hClientRegion = NativeMethods.NullHandleRef; 
                    HandleRef hTotalRegion = NativeMethods.NullHandleRef;

                    try {
                        // get the total client area, then exclude the client by using XOR 
                        hTotalRegion = new HandleRef(this, SafeNativeMethods.CreateRectRgn(0, 0, this.Width, this.Height));
                        hClientRegion = new HandleRef(this, SafeNativeMethods.CreateRectRgn(absoluteClientRectangle.left, absoluteClientRectangle.top, absoluteClientRectangle.right, absoluteClientRectangle.bottom)); 
                        hNonClientRegion = new HandleRef(this, SafeNativeMethods.CreateRectRgn(0,0,0,0)); 

                        SafeNativeMethods.CombineRgn(hNonClientRegion, hTotalRegion, hClientRegion, NativeMethods.RGN_XOR); 

                        // Call RedrawWindow with the region.
                        NativeMethods.RECT ignored = new NativeMethods.RECT();
                        SafeNativeMethods.RedrawWindow(new HandleRef(this, Handle), 
                                                       ref ignored , hNonClientRegion,
                                                       NativeMethods.RDW_INVALIDATE | NativeMethods.RDW_ERASE | 
                                                       NativeMethods.RDW_UPDATENOW  | NativeMethods.RDW_ERASENOW   | 
                                                       NativeMethods.RDW_FRAME);
                    } 
                    finally {
                        // clean up our regions.
                        try {
                            if (hNonClientRegion.Handle != IntPtr.Zero) { 
                                SafeNativeMethods.DeleteObject(hNonClientRegion);
                            } 
                        } 
                        finally {
                            try { 
                                if (hClientRegion.Handle != IntPtr.Zero) {
                                    SafeNativeMethods.DeleteObject(hClientRegion);
                                }
                            } 
                            finally {
                                if (hTotalRegion.Handle != IntPtr.Zero) { 
                                    SafeNativeMethods.DeleteObject(hTotalRegion); 
                                }
                            } 
                        }

                    }
 
                }
 
                protected override void OnGotFocus(EventArgs e) { 
                    base.OnGotFocus(e);
                    InvalidateNonClient(); 
                }

                protected override void OnLostFocus(EventArgs e) {
                    base.OnLostFocus(e); 
                    InvalidateNonClient();
 
                } 

                protected override void OnMouseEnter(EventArgs e) { 
                    base.OnMouseEnter(e);
                    MouseIsOver = true;

                } 

                protected override void OnMouseLeave(EventArgs e) { 
                    base.OnMouseLeave(e); 
                    MouseIsOver = false;
                } 


                private void HookStaticEvents(bool hook) {
                   if (hook) { 
                      try {
                         SystemEvents.UserPreferenceChanged += new UserPreferenceChangedEventHandler(OnUserPreferenceChanged); 
                     } 
                     finally{
                         numberHooked++; 
                     }
                   }
                   else if (numberHooked > 0) {
                        try { 
                            SystemEvents.UserPreferenceChanged -= new UserPreferenceChangedEventHandler(OnUserPreferenceChanged);
                        } 
                        finally { 
                            numberHooked--;
                        } 
                   }

                }
                private void OnUserPreferenceChanged(object sender, UserPreferenceChangedEventArgs e) { 
                    if (e.Category == UserPreferenceCategory.Window) {
                        if (!isFontSet) { 
                            this.Font = ToolStripManager.DefaultFont; 
                        }
                    } 
                }

                protected override void OnVisibleChanged(EventArgs e) {
                    base.OnVisibleChanged(e); 
                    if (!Disposing && !IsDisposed) {
                        HookStaticEvents(Visible); 
                    } 
                }
 
                protected override void Dispose(bool disposing) {
                    if(disposing) {
                        HookStaticEvents(false);
                    } 
                    base.Dispose(disposing);
                } 
 
                private void WmNCPaint(ref Message m) {
 
                    if (!IsPopupTextBox) {
                        base.WndProc(ref m);
                        return;
                    } 

                    // Paint over the edges of the text box. 
 
                    // Using GetWindowDC instead of GetDCEx as GetDCEx seems to return a null handle and a last error of
                    // the operation succeeded.  We're not going to use the clipping rect anyways - so it's not 
                    // that bigga deal.
                    HandleRef hdc = new HandleRef(this, UnsafeNativeMethods.GetWindowDC(new HandleRef(this,m.HWnd)));
                    if (hdc.Handle == IntPtr.Zero) {
                        throw new Win32Exception(); 
                    }
                    try { 
                        // Dont set the clipping region based on the WParam - windows seems to hack out the two pixels 
                        // intended for the non-client border.
 
                        Color outerBorderColor = (MouseIsOver || Focused) ? ColorTable.TextBoxBorder : this.BackColor;
                        Color innerBorderColor = this.BackColor;

                        if (!Enabled) { 
                            outerBorderColor = SystemColors.ControlDark;
                            innerBorderColor = SystemColors.Control; 
                        } 
                        using (Graphics g = Graphics.FromHdcInternal(hdc.Handle)) {
 
                            Rectangle clientRect = AbsoluteClientRectangle;

                            // could have set up a clip and fill-rectangled, thought this would be faster.
                            using (Brush b = new SolidBrush(innerBorderColor)) { 
                                g.FillRectangle(b, 0, 0, this.Width, clientRect.Top); // top border
                                g.FillRectangle(b, 0, 0, clientRect.Left, this.Height); // left border 
                                g.FillRectangle(b, 0, clientRect.Bottom, this.Width, this.Height - clientRect.Height); // bottom border 
                                g.FillRectangle(b, clientRect.Right, 0, this.Width - clientRect.Right, this.Height); // right border
                            } 

                            // paint the outside rect.
                            using (Pen p = new Pen(outerBorderColor)) {
                                g.DrawRectangle(p, 0, 0, this.Width - 1, this.Height - 1); 
                            }
 
                        } 
                    }
                    finally { 
                        UnsafeNativeMethods.ReleaseDC(new HandleRef(this, this.Handle),hdc);
                    }
                    // we've handled WM_NCPAINT.
                    m.Result = IntPtr.Zero; 

                } 
                protected override void WndProc(ref Message m) { 
                    if (m.Msg == NativeMethods.WM_NCPAINT) {
                        WmNCPaint(ref m); 
                        return;
                    }
                    else {
                        base.WndProc(ref m); 
                    }
                } 
        } 

 
    }

}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

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