Re: How Window Handles invalidate

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Have a look at the InvalidateRect(), InvalidateRgn() and RedrawWindow() calls.

"rino" <rino@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:FBAFB0FF-408A-4772-99A5-8AB6072500EC@xxxxxxxxxxxxxxxx
can anyone tell me how windows manages the z ordering and how windows knows
to invalidate a specific rectangle in the window , doing it efficienlty. My
question is a problem I am trying to solve. I am trying to create an editor
where you can add different ui items , shapes etc. And I want to know the
best way to implement an Undo function without having to repainnt the whole
window but only the specific region where I did the undo.

thanks.

.

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