Added stub for WindowState.

Source/OpenTK/GameWindow.cs

@@ -262,7 +262,7 @@ namespace OpenTK
 
         #endregion
 
-        #region --- Public Methods ---
+        #region --- Public Members ---
 
         #region public virtual void Exit()
 
@@ -925,6 +925,18 @@ namespace OpenTK
 
         #endregion
 
+        internal WindowState WindowState
+        {
+            get
+            {
+                return glWindow.WindowState;
+            }
+            set
+            {
+                glWindow.WindowState = value;
+            }
+        }
+
         #endregion
 
         #region --- GameWindow Timing ---

Source/OpenTK/Platform/INativeGLWindow.cs

@@ -35,6 +35,7 @@ namespace OpenTK.Platform
         //IGraphicsContext Context { get; }
         IInputDriver InputDriver { get; }
         bool Fullscreen { get; set; }
+        WindowState WindowState { get; set; }
 
         event CreateEvent Create;
         event DestroyEvent Destroy;

Source/OpenTK/Platform/Windows/WinGLNative.cs

@@ -455,6 +455,22 @@ namespace OpenTK.Platform.Windows
 
         #endregion
 
+        #region public OpenTK.WindowState WindowState
+
+        public OpenTK.WindowState WindowState
+        {
+            get
+            {
+                throw new NotImplementedException();
+            }
+            set
+            {
+                throw new NotImplementedException();
+            }
+        }
+
+        #endregion
+
         #endregion
 
         #region --- IResizable Members ---

Source/OpenTK/Platform/X11/X11GLNative.cs

@@ -563,6 +563,22 @@ namespace OpenTK.Platform.X11
 
         #endregion
 
+        #region public OpenTK.WindowState WindowState
+
+        public OpenTK.WindowState WindowState
+        {
+            get
+            {
+                throw new NotImplementedException();
+            }
+            set
+            {
+                throw new NotImplementedException();
+            }
+        }
+
+        #endregion
+
         #endregion
 
         #region --- IResizable Members ---

Source/OpenTK/WindowState.cs

@@ -0,0 +1,37 @@
+#region --- License ---
+/* Licensed under the MIT/X11 license.
+ * Copyright (c) 2006-2008 the OpenTK Team.
+ * This notice may not be removed from any source distribution.
+ * See license.txt for licensing details.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace OpenTK
+{
+    /// <summary>
+    /// Defines the available states for the GameWindow.
+    /// </summary>
+    public enum WindowState
+    {
+        /// <summary>
+        /// The GameWindow is minimized to the taskbar (also known as 'iconified').
+        /// </summary>
+        Minimized,
+        /// <summary>
+        /// The GameWindow is in its normal state.
+        /// </summary>
+        Normal,
+        /// <summary>
+        /// The GameWindow covers the whole working area, which includes the desktop but not the taskbar and/or panels.
+        /// </summary>
+        Maximized,
+        /// <summary>
+        /// The GameWindow covers the whole screen, including all taskbars and/or panels.
+        /// </summary>
+        Fullscreen
+    }
+}