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diff --git a/src/Input/MouseState.cs b/src/Input/MouseState.cs
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+ #region License
+ //
+ // The Open Toolkit Library License
+ //
+ // Copyright (c) 2006 - 2009 the Open Toolkit library.
+ //
+ // 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.
+ //
+ #endregion
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Crow
+{
+    /// <summary>
+    /// Encapsulates the state of a mouse device.
+    /// </summary>
+    public struct MouseState : IEquatable<MouseState>
+    {
+	#region Fields
+
+	internal const int MaxButtons = 16; // we are storing in an ushort
+	Point position;
+	MouseScroll scroll;
+	ushort buttons;
+	bool is_connected;
+
+	#endregion
+
+	#region Public Members
+
+	/// <summary>
+	/// Gets a <see cref="System.Boolean"/> indicating whether the specified
+	/// <see cref="OpenTK.Input.MouseButton"/> is pressed.
+	/// </summary>
+	/// <param name="button">The <see cref="OpenTK.Input.MouseButton"/> to check.</param>
+	/// <returns>True if key is pressed; false otherwise.</returns>
+	public bool this[MouseButton button]
+	{
+	    get { return IsButtonDown(button); }
+	    internal set
+	    {
+		if (value)
+		    EnableBit((int)button);
+		else
+		    DisableBit((int)button);
+	    }
+	}
+
+	/// <summary>
+	/// Gets a <see cref="System.Boolean"/> indicating whether this button is down.
+	/// </summary>
+	/// <param name="button">The <see cref="OpenTK.Input.MouseButton"/> to check.</param>
+	public bool IsButtonDown(MouseButton button)
+	{
+	    return ReadBit((int)button);
+	}
+
+	/// <summary>
+	/// Gets a <see cref="System.Boolean"/> indicating whether this button is up.
+	/// </summary>
+	/// <param name="button">The <see cref="OpenTK.Input.MouseButton"/> to check.</param>
+	public bool IsButtonUp(MouseButton button)
+	{
+	    return !ReadBit((int)button);
+	}
+
+	/// <summary>
+	/// Gets the absolute wheel position in integer units.
+	/// To support high-precision mice, it is recommended to use <see cref="WheelPrecise"/> instead.
+	/// </summary>
+	public int Wheel
+	{
+	    get { return (int)Math.Round(scroll.Y, MidpointRounding.AwayFromZero); }
+	}
+
+	/// <summary>
+	/// Gets the absolute wheel position in floating-point units.
+	/// </summary>
+	public float WheelPrecise
+	{
+	    get { return scroll.Y; }
+	}
+
+	/// <summary>
+	/// Gets a <see cref="OpenTK.Input.MouseScroll"/> instance,
+	/// representing the current state of the mouse scroll wheel.
+	/// </summary>
+	public MouseScroll Scroll
+	{
+	    get { return scroll; }
+	}
+
+	/// <summary>
+	/// Gets an integer representing the absolute x position of the pointer, in window pixel coordinates.
+	/// </summary>
+	public int X
+	{
+			get { return position.X; }
+	    internal set { position.X = value; }
+	}
+
+	/// <summary>
+	/// Gets an integer representing the absolute y position of the pointer, in window pixel coordinates.
+	/// </summary>
+	public int Y
+	{
+			get { return position.Y; }
+	    internal set { position.Y = value; }
+	}
+
+	/// <summary>
+	/// Gets a <see cref="System.Boolean"/> indicating whether the left mouse button is pressed.
+	/// This property is intended for XNA compatibility.
+	/// </summary>
+	public ButtonState LeftButton
+	{
+	    get { return IsButtonDown(MouseButton.Left) ? ButtonState.Pressed : ButtonState.Released; }
+	}
+
+	/// <summary>
+	/// Gets a <see cref="System.Boolean"/> indicating whether the middle mouse button is pressed.
+	/// This property is intended for XNA compatibility.
+	/// </summary>
+	public ButtonState MiddleButton
+	{
+	    get { return IsButtonDown(MouseButton.Middle) ? ButtonState.Pressed : ButtonState.Released; }
+	}
+
+	/// <summary>
+	/// Gets a <see cref="System.Boolean"/> indicating whether the right mouse button is pressed.
+	/// This property is intended for XNA compatibility.
+	/// </summary>
+	public ButtonState RightButton
+	{
+	    get { return IsButtonDown(MouseButton.Right) ? ButtonState.Pressed : ButtonState.Released; }
+	}
+
+	/// <summary>
+	/// Gets a <see cref="System.Boolean"/> indicating whether the first extra mouse button is pressed.
+	/// This property is intended for XNA compatibility.
+	/// </summary>
+	public ButtonState XButton1
+	{
+	    get { return IsButtonDown(MouseButton.Button1) ? ButtonState.Pressed : ButtonState.Released; }
+	}
+
+	/// <summary>
+	/// Gets a <see cref="System.Boolean"/> indicating whether the second extra mouse button is pressed.
+	/// This property is intended for XNA compatibility.
+	/// </summary>
+	public ButtonState XButton2
+	{
+	    get { return IsButtonDown(MouseButton.Button2) ? ButtonState.Pressed : ButtonState.Released; }
+	}
+
+	/// <summary>
+	/// Gets the absolute wheel position in integer units. This property is intended for XNA compatibility.
+	/// To support high-precision mice, it is recommended to use <see cref="WheelPrecise"/> instead.
+	/// </summary>
+	public int ScrollWheelValue
+	{
+	    get { return Wheel; }
+	}
+
+	/// <summary>
+	/// Gets a value indicating whether this instance is connected.
+	/// </summary>
+	/// <value><c>true</c> if this instance is connected; otherwise, <c>false</c>.</value>
+	public bool IsConnected
+	{
+	    get { return is_connected; }
+	    internal set { is_connected = value; }
+	}
+
+	/// <summary>
+	/// Checks whether two <see cref="MouseState" /> instances are equal.
+	/// </summary>
+	/// <param name="left">
+	/// A <see cref="MouseState"/> instance.
+	/// </param>
+	/// <param name="right">
+	/// A <see cref="MouseState"/> instance.
+	/// </param>
+	/// <returns>
+	/// True if both left is equal to right; false otherwise.
+	/// </returns>
+	public static bool operator ==(MouseState left, MouseState right)
+	{
+	    return left.Equals(right);
+	}
+
+	/// <summary>
+	/// Checks whether two <see cref="MouseState" /> instances are not equal.
+	/// </summary>
+	/// <param name="left">
+	/// A <see cref="MouseState"/> instance.
+	/// </param>
+	/// <param name="right">
+	/// A <see cref="MouseState"/> instance.
+	/// </param>
+	/// <returns>
+	/// True if both left is not equal to right; false otherwise.
+	/// </returns>
+	public static bool operator !=(MouseState left, MouseState right)
+	{
+	    return !left.Equals(right);
+	}
+
+	/// <summary>
+	/// Compares to an object instance for equality.
+	/// </summary>
+	/// <param name="obj">
+	/// The <see cref="System.Object"/> to compare to.
+	/// </param>
+	/// <returns>
+	/// True if this instance is equal to obj; false otherwise.
+	/// </returns>
+	public override bool Equals(object obj)
+	{
+	    if (obj is MouseState)
+	    {
+		return this == (MouseState)obj;
+	    }
+	    else
+	    {
+		return false;
+	    }
+	}
+
+	/// <summary>
+	/// Generates a hashcode for the current instance.
+	/// </summary>
+	/// <returns>
+	/// A <see cref="System.Int32"/> represting the hashcode for this instance.
+	/// </returns>
+	public override int GetHashCode()
+	{
+	    return buttons.GetHashCode() ^ X.GetHashCode() ^ Y.GetHashCode() ^ scroll.GetHashCode();
+	}
+
+	/// <summary>
+	/// Returns a <see cref="System.String"/> that represents the current <see cref="OpenTK.Input.MouseState"/>.
+	/// </summary>
+	/// <returns>A <see cref="System.String"/> that represents the current <see cref="OpenTK.Input.MouseState"/>.</returns>
+	public override string ToString()
+	{
+	    string b = Convert.ToString(buttons, 2).PadLeft(10, '0');
+	    return String.Format("[X={0}, Y={1}, Scroll={2}, Buttons={3}, IsConnected={4}]",
+		X, Y, Scroll, b, IsConnected);
+	}
+
+	#endregion
+
+	#region Internal Members
+
+	internal Point Position
+	{
+	    get { return position; }
+	    set { position = value; }
+	}
+
+	internal bool ReadBit(int offset)
+	{
+	    ValidateOffset(offset);
+	    return (buttons & (1 << offset)) != 0;
+	}
+
+	internal void EnableBit(int offset)
+	{
+	    ValidateOffset(offset);
+	    buttons |= unchecked((ushort)(1 << offset));
+	}
+
+	internal void DisableBit(int offset)
+	{
+	    ValidateOffset(offset);
+	    buttons &= unchecked((ushort)(~(1 << offset)));
+	}
+
+	internal void MergeBits(MouseState other)
+	{
+	    buttons |= other.buttons;
+	    SetScrollRelative(other.scroll.X, other.scroll.Y);
+	    X += other.X;
+	    Y += other.Y;
+	    IsConnected |= other.IsConnected;
+	}
+
+	internal void SetIsConnected(bool value)
+	{
+	    IsConnected = value;
+	}
+
+	#region Internal Members
+
+	internal void SetScrollAbsolute(float x, float y)
+	{
+	    scroll.X = x;
+	    scroll.Y = y;
+	}
+
+	internal void SetScrollRelative(float x, float y)
+	{
+	    scroll.X += x;
+	    scroll.Y += y;
+	}
+
+	#endregion
+
+	#endregion
+
+	#region Private Members
+
+	static void ValidateOffset(int offset)
+	{
+	    if (offset < 0 || offset >= 16)
+		throw new ArgumentOutOfRangeException("offset");
+	}
+
+	#endregion
+
+	#region IEquatable<MouseState> Members
+
+	/// <summary>
+	/// Compares two MouseState instances.
+	/// </summary>
+	/// <param name="other">The instance to compare two.</param>
+	/// <returns>True, if both instances are equal; false otherwise.</returns>
+	public bool Equals(MouseState other)
+	{
+	    return
+		buttons == other.buttons &&
+		X == other.X &&
+		Y == other.Y &&
+		Scroll == other.Scroll;
+	}
+
+	#endregion
+    }
+}