It is a method, I have the code from here (I don't know who posted it)

_screen.addobject('ScreenHook','Sh')


define class ScreenHook as custom  
oScreenRef = _screen

PROCEDURE oScreenRef.RightClick
	WAIT WINDOW 'Right Click' nowait
	*your code here...
ENDPROC 

PROCEDURE oScreenRef.Resize
	WAIT WINDOW 'Resize' nowait
ENDPROC 

enddefine

>Is it possible to add a right click shortcut menu to the main FoxPro background window e.g. to allow users to set _screen.picture on/off on the fly? Thanks, Denis