DRAWING
Get a pointer to GWorld of a window
There is no special association between a window and a GWorld, and so your attempts are doomed to failure :-(
For what it's worth, you can get information similar to the above from the window's CGrafPort, as follows:-
WINDOW 1,,(0,0)-(319,239),3
wptr&=WINDOW(_wndPointer)
pixMapHndl&=[wptr& + _portPixMap]
DstRowBytes% = pixMapHndl&..RowBytes% AND &H3fff
DstPtr&=pixMapHndl&..BaseAddr&
Robert