Drawing Offscreen in Windows GDI

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Main - Computing - Drawing Offscreen in Windows GDI

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MathOnNapkins

Posted on 03-02-07 01:15 PM

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Since: 02-19-07
From: durff

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Is there any way to force a window to draw itself, including all its controls like buttons and edit controls, while offscreen? Or is there anyway to simulate this while the window is invisible so I can copy what would normally appear into a DC?

I'm trying to do something like this: You've got a 500 x 500 window that is scrollable but contains nothing. You've also got a 1000x1000 window that is either invisible or offscreen, but it's the one that contains all your controls and other stuff.

What's the point? I think if I could do this it could simplify scrolling mechanisms for windows with controls on them. But every single article I've dredged up on google leaves me with answers that don't work or don't apply. I even tried PrintWindow( ) and I couldn't even get that to import. Some bizarre problem with user32.lib not importing correctly. I'm using Visual Studio 7 and it seems to be a bit more restrictive than VS 6 >8(.

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Main - Computing - Drawing Offscreen in Windows GDI

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