Capture windowed DirectX application to bitmap

It is possible to screencapture another direct x application using destop's DC to HBITMAP.
But is there a way to capture from partially covered DirectX window?

Never tried with DirectX but I suppose it should work.

If you mean you're trying to capture the content of a screen partially covered by your own appication, the techique is to hide your own window, perform the capture, then show your window again.

Before performing the capture, you may need a short delay to allow DirectX to repaint the area that was covered by your window.

You can use this funtion:

Code:

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HWND WindowFromPoint(Point p)

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to get the window's handle, you pass an x,y point on the screen which is also on the application you want to capture.

Then use

Code:

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HDC GetDC(HWND hWnd)

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to get the HDC of the window

This may get you started on what you want to do.

Quote:

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Originally Posted by Mike Harnad

This may get you started on what you want to do.

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Wow, thank you. This will really help alot!

The problem is to get IDirect3DSurface9 from another application.
I'd like to know how Fraps works. I can start recording any windowed DirectX application, then change focus to another window, say, notepad. And i can move notepad so it partially or fully cover DirectX application, but Fraps still continue to record that application.

Read the direct memory involve. Although that could be on-board the graphics card, or else system memory. Kind of defeats the purpose of DirectX.

I doubt you'll be able to record it, either