screen capture

[Michael Rothwell <rothwell holly-springs nc us>]

Hello, I've been searching around for a good way to capture a specific section of the display (x,y,w,h) under 
a given window, in order to produce a "transparent" tooltip. I've seen the new KDE do fade-in menus, so it 
seems possible. Is there a way to query the X server for everything beneath a specific window's paintable 
area?

Thanks,

-M