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diff --git a/source/ShiftUI/ToolStrip/ToolStripSplitButton.cs b/source/ShiftUI/ToolStrip/ToolStripSplitButton.cs
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+++ b/source/ShiftUI/ToolStrip/ToolStripSplitButton.cs
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+//
+// ToolStripSplitButton.cs
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+// Copyright (c) 2006 Jonathan Pobst
+//
+// Authors:
+//	Jonathan Pobst ([email protected])
+//
+
+using System;
+using System.Drawing;
+using System.ComponentModel;
+using ShiftUI.Design;
+
+namespace ShiftUI
+{
+	[DefaultEvent ("ButtonClick")]
+	[ToolStripItemDesignerAvailability (ToolStripItemDesignerAvailability.ToolStrip | ToolStripItemDesignerAvailability.StatusStrip)]
+	public class ToolStripSplitButton : ToolStripDropDownItem
+	{
+		private bool button_pressed;
+		private ToolStripItem default_item;
+		private bool drop_down_button_selected;
+		private int drop_down_button_width;
+		
+		#region Public Constructors
+		public ToolStripSplitButton()
+			: this (string.Empty, null, null, string.Empty)
+		{
+		}
+		
+		public ToolStripSplitButton (Image image)
+			: this (string.Empty, image, null, string.Empty)
+		{
+		}
+		
+		public ToolStripSplitButton (string text)
+			: this (text, null, null, string.Empty)
+		{
+		}
+		
+		public ToolStripSplitButton (string text, Image image)
+			: this (text, image, null, string.Empty)
+		{
+		}
+		
+		public ToolStripSplitButton (string text, Image image, EventHandler onClick)
+			: this (text, image, onClick, string.Empty)
+		{
+		}
+		
+		public ToolStripSplitButton (string text, Image image, params ToolStripItem[] dropDownItems)
+			: base (text, image, dropDownItems)
+		{
+			this.ResetDropDownButtonWidth ();
+		}
+
+		public ToolStripSplitButton (string text, Image image, EventHandler onClick, string name)
+			: base (text, image, onClick, name)
+		{
+			this.ResetDropDownButtonWidth ();
+		}
+		#endregion
+
+		#region Public Properties
+		[DefaultValue (true)]
+		public new bool AutoToolTip {
+			get { return base.AutoToolTip; }
+			set { base.AutoToolTip = value; }
+		}
+
+		[Browsable (false)]
+		public Rectangle ButtonBounds {
+			get { return new Rectangle (Bounds.Left, Bounds.Top, this.Bounds.Width - this.drop_down_button_width - 1, this.Height); }
+		}
+
+		[Browsable (false)]
+		public bool ButtonPressed {
+			get { return this.button_pressed; }
+		}
+
+		[Browsable (false)]
+		public bool ButtonSelected {
+			get { return base.Selected; }
+		}
+
+		[Browsable (false)]
+		[DefaultValue (null)]
+		public ToolStripItem DefaultItem {
+			get { return this.default_item; }
+			set {
+				if (this.default_item != value) {
+					this.default_item = value;
+					this.OnDefaultItemChanged (EventArgs.Empty);
+				}
+			}
+		}
+		
+		[Browsable (false)]
+		public Rectangle DropDownButtonBounds {
+			get { return new Rectangle (this.Bounds.Right - this.drop_down_button_width, 0, this.drop_down_button_width, this.Bounds.Height); }
+		}
+
+		[Browsable (false)]
+		public bool DropDownButtonPressed {
+			get { return this.drop_down_button_selected || (this.HasDropDownItems && this.DropDown.Visible); }
+		}
+
+		[Browsable (false)]
+		public bool DropDownButtonSelected {
+			get { return base.Selected; }
+		}
+		
+		public int DropDownButtonWidth {
+			get { return this.drop_down_button_width; }
+			set { 
+				if (value < 0)
+					throw new ArgumentOutOfRangeException ();
+				if (this.drop_down_button_width != value) {
+					this.drop_down_button_width = value;
+					CalculateAutoSize ();
+				}
+			}
+		}
+
+		[Browsable (false)]
+		public Rectangle SplitterBounds {
+			get { return new Rectangle (this.Bounds.Width - this.drop_down_button_width - 1, 0, 1, this.Height); }
+		}
+		#endregion
+
+		#region Protected Properties
+		protected override bool DefaultAutoToolTip {
+			get { return true; }
+		}
+
+		protected internal override bool DismissWhenClicked {
+			get { return true; }
+		}
+		#endregion
+
+		#region Public Methods
+		public override Size GetPreferredSize (Size constrainingSize)
+		{
+			// base should calculate the button part for us, add the splitter
+			// and drop down arrow part to that
+			Size s = base.GetPreferredSize (constrainingSize);
+
+			if (s.Width < 23)
+				s.Width = 23;
+
+			// If we are a fixed size, we can't add more in for the drop down
+			// button, but we can for autosize
+			if (AutoSize)
+				s.Width += (this.drop_down_button_width - 2);
+			
+			return s;
+		}
+		
+		public virtual void OnButtonDoubleClick (EventArgs e)
+		{
+			EventHandler eh = (EventHandler)(Events [ButtonDoubleClickEvent]);
+			if (eh != null)
+				eh (this, e);
+		}
+		
+		public void PerformButtonClick ()
+		{
+			if (this.Enabled)
+				this.OnButtonClick (EventArgs.Empty);
+		}
+		
+		//[EditorBrowsable (EditorBrowsableState.Never)]
+		public virtual void ResetDropDownButtonWidth ()
+		{
+			this.DropDownButtonWidth = 11;
+		}
+		#endregion
+
+		#region Protected Methods
+		protected override AccessibleObject CreateAccessibilityInstance ()
+		{
+			return new ToolStripSplitButtonAccessibleObject (this);
+		}
+		
+		protected override ToolStripDropDown CreateDefaultDropDown ()
+		{
+			ToolStripDropDownMenu tsddm = new ToolStripDropDownMenu ();
+			tsddm.OwnerItem = this;
+			return tsddm;
+		}
+		
+		protected virtual void OnButtonClick (EventArgs e)
+		{
+			EventHandler eh = (EventHandler)Events [ButtonClickEvent];
+			if (eh != null)
+				eh (this, e);
+		}
+		
+		protected virtual void OnDefaultItemChanged (EventArgs e)
+		{
+			EventHandler eh = (EventHandler)Events [DefaultItemChangedEvent];
+			if (eh != null)
+				eh (this, e);
+		}
+
+		protected override void OnMouseDown (MouseEventArgs e)
+		{
+			if (this.ButtonBounds.Contains (e.Location))
+			{
+				this.button_pressed = true;
+				this.Invalidate ();
+				base.OnMouseDown (e);
+			}
+			else if (this.DropDownButtonBounds.Contains (e.Location))
+			{
+				if (this.DropDown.Visible)
+					this.HideDropDown (ToolStripDropDownCloseReason.ItemClicked);
+				else
+					this.ShowDropDown ();
+			
+				this.Invalidate ();
+				base.OnMouseDown (e);
+			}
+		}
+
+		protected override void OnMouseLeave (EventArgs e)
+		{
+			this.drop_down_button_selected = false;
+			this.button_pressed = false;
+			
+			this.Invalidate ();
+			
+			base.OnMouseLeave (e);
+		}
+
+		protected override void OnMouseUp (MouseEventArgs e)
+		{
+			this.button_pressed = false;
+			this.Invalidate ();
+			
+			base.OnMouseUp (e);
+		}
+		
+		protected override void OnPaint (PaintEventArgs e)
+		{
+			base.OnPaint (e);
+
+			if (this.Owner != null) {
+				Color font_color = this.Enabled ? this.ForeColor : SystemColors.GrayText;
+				Image draw_image = this.Enabled ? this.Image : ToolStripRenderer.CreateDisabledImage (this.Image);
+
+				this.Owner.Renderer.DrawSplitButton (new ShiftUI.ToolStripItemRenderEventArgs (e.Graphics, this));
+
+				Rectangle text_layout_rect;
+				Rectangle image_layout_rect;
+
+				Rectangle r = this.ContentRectangle;
+				r.Width -= (this.drop_down_button_width + 1);
+				
+				this.CalculateTextAndImageRectangles (r, out text_layout_rect, out image_layout_rect);
+
+				if (text_layout_rect != Rectangle.Empty)
+					this.Owner.Renderer.DrawItemText (new ShiftUI.ToolStripItemTextRenderEventArgs (e.Graphics, this, this.Text, text_layout_rect, font_color, this.Font, this.TextAlign));
+				if (image_layout_rect != Rectangle.Empty)
+					this.Owner.Renderer.DrawItemImage (new ShiftUI.ToolStripItemImageRenderEventArgs (e.Graphics, this, draw_image, image_layout_rect));
+
+				this.Owner.Renderer.DrawArrow (new ToolStripArrowRenderEventArgs (e.Graphics, this, new Rectangle (this.Width - 9, 1, 6, this.Height), Color.Black, ArrowDirection.Down));
+				
+				return;
+			}
+		}
+
+		protected override void OnRightToLeftChanged (EventArgs e)
+		{
+			base.OnRightToLeftChanged (e);
+		}
+		
+		protected internal override bool ProcessDialogKey (Keys keyData)
+		{
+			if (this.Selected && keyData == Keys.Enter && this.DefaultItem != null) {
+				this.DefaultItem.FireEvent (EventArgs.Empty, ToolStripItemEventType.Click);
+				return true;
+			}
+
+			return base.ProcessDialogKey (keyData);
+		}
+
+		protected internal override bool ProcessMnemonic (char charCode)
+		{
+			if (!this.Selected)
+				this.Parent.ChangeSelection (this);
+
+			if (this.HasDropDownItems)
+				this.ShowDropDown ();
+			else
+				this.PerformClick ();
+
+			return true;
+		}
+		#endregion
+
+		#region Internal Methods
+		internal override void HandleClick (int mouse_clicks, EventArgs e)
+		{
+			base.HandleClick (mouse_clicks, e);
+
+			MouseEventArgs mea = e as MouseEventArgs;
+			
+			if (mea != null)
+				if (ButtonBounds.Contains (mea.Location))
+					OnButtonClick (EventArgs.Empty);
+		}
+		#endregion
+		
+		#region Public Events
+		static object ButtonClickEvent = new object ();
+		static object ButtonDoubleClickEvent = new object ();
+		static object DefaultItemChangedEvent = new object ();
+
+		public event EventHandler ButtonClick {
+			add { Events.AddHandler (ButtonClickEvent, value); }
+			remove {Events.RemoveHandler (ButtonClickEvent, value); }
+		}
+		public event EventHandler ButtonDoubleClick {
+			add { Events.AddHandler (ButtonDoubleClickEvent, value); }
+			remove {Events.RemoveHandler (ButtonDoubleClickEvent, value); }
+		}
+		public event EventHandler DefaultItemChanged {
+			add { Events.AddHandler (DefaultItemChangedEvent, value); }
+			remove {Events.RemoveHandler (DefaultItemChangedEvent, value); }
+		}
+		#endregion
+
+		#region ToolStripSplitButtonAccessibleObject Class
+		public class ToolStripSplitButtonAccessibleObject : ToolStripItemAccessibleObject
+		{
+			#region Public Constructor
+			public ToolStripSplitButtonAccessibleObject (ToolStripSplitButton item) : base (item)
+			{
+			}
+			#endregion
+
+			#region Public Method
+			public override void DoDefaultAction ()
+			{
+				(owner_item as ToolStripSplitButton).PerformButtonClick ();
+			}
+			#endregion
+		}
+		#endregion
+	}
+}