Take screenshot of full-screen applications in C++a

[iconiK]

Hello!

I want to know how to take a screenshot of a full-screen application (that's using DirectX or OpenGL) from my application. I have tried using Qt's built-in feature, but it only remotely works on Windows XP, where I get a black screen. On Windows 7 with Aero I get a little black box in the top left corner. I've looked around for a few days but I'm unable to find anything, except programs that can - but don't have their source-code available.

Could you help me, please?

Thanks!

[weaknessforcats]

You can't use:

1) Call GetDesktopWindo w
2 )Use the return to call GetDC
3) Use the return to call Call CreateCompatibl eDC
4) Use the return to call CreateCompatibl eDC
5) Then call CreateCompatibl eBitmap
6) Then call SelectObject
7) Then call BitBlt

?

[george666]

You can't use:
1) Call GetDesktopWindo w

No.
Use DX screen capture apis.