Offscreen Capture?

[chipp at altuit.com]

Ken (and others),
Thought you might be able to help me. 
I'm building this org chart program which builds boxes connected by lines in a tree-structure from a text outline.

I'd like to export the whole thing as a single GIF,JPG or PNG
So, I build this all in an offscreen window - and size the window to fit it all, then try an offscreen capture (import snapshot), and you can guess it doesn't work. It only seems to capture stuff on screen.

Any ideas or work arounds you might have and lend some insight.

Thanks,

Chipp