VNC.RFBDrawing.UpdateDecoders.Decoder.decode Function
decodes an update.

Public void decode (int, int, int, int)
  Type Name Description  
    int xpos the x-coordinate of the top-left corner of the update  
    int ypos the y-coordinate of the top-left corner of the update  
    int width the width of the update  
    int height the height of the update  
  Return Description  
    void    
Remarks:
the precondition for calling this method is: the Decode must have been initalized using initalize