Win32 questions

[Laferriere, Bob (MED)]

I've been working on a small gateway process that collects Xprotocol
requests on a UNIX box, takes a screen snapshot, and paints the image
into the Xvnc display. Although this is not the best approach for
performance, I am constrained to be able to spy on a remote display and
must leave the remote host UI untouched. 

I have followed the WinVNC design but instead of doing screen snapshots
every 1ms, I'm doing them only on paint events to the screen. My
understanding is that WinVNC takes a full snapshot using BitBlt() then
computes if there are any differences. What puzzles me is the hooks that
are setup. There is a hook for WM_PAINT events. What does this hook do
that is different from the screen snapshot that is occurring every ms?

Please excuse my Win32 graphics ignorance. Any help is greatly
appreciated.

	Thanks,
	Bob

	GE  Medical Technology Services
	_________________________________________
	Robert J. Laferriere
	Project Zero Lead Architect, "Shoot for Nil!"
	Global Service Technology
	Phone: 414/896-2794, 3-2794  Pager: 414/557-7888




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