winapi - Is there any way to hook whole drawing functions for a process under windows? -

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i want capture window displays. on other hand, nice if window doesn't display nothing on screen. how? process call drawing functions, function hook , draw somewhere else (for example bitmap file) , return without drawing on screen.

what know is, in windows nt architecture, every thread has system call table , can change system call table of single thread (or set in beginning) functions. changing drawing api (gdi?) (i not sure how survive if application uses directx rendering maybe there way) feel can it. can i? should if application uses directx rendering?

thanks in advance,

ali veli

i ended hooking createdc-like functions, made creating memory device context , letting other functions draw on memory dc.


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