Incorrect XDelta and YDelta values in MouseMoveEventArgs

        /// <summary>
 
        /// Sets a System.Drawing.Point representing the absolute position of the pointer, in window pixel coordinates.
 
        /// </summary>
 
        internal Point Position
 
        {
 
            set
 
            {
 
                pos = value;
 
                last_pos = pos;
 
 
 
                Move(this, new MouseMoveEventArgs(pos.X, pos.Y, pos.X - last_pos.X, pos.Y - last_pos.Y));
 
            }
 
        }

        /// <summary>
        /// Sets a System.Drawing.Point representing the absolute position of the pointer, in window pixel coordinates.
        /// </summary>
        internal Point Position
        {
            set
            {
                pos = value;
 
                Move(this, new MouseMoveEventArgs(pos.X, pos.Y, pos.X - last_pos.X, pos.Y - last_pos.Y));
 
                last_pos = pos;
            }
        }