transparency between windows

I'm writing an application, that should
show a live video (from pc camera) on one window,
and another window with some control on it,
should appears below it.

I'm using 'IVideoWindow' Interface from DirectShow.
This window should be semi transparent.

I think that the AlphaBlend() SDK should do that work,
but I couldn't find how to connect it with IVideoWindow.

* The use of IVideoWindow is not mandatory
* OS win2000
* DirectX 7
* Code in C++

Waiting for advises

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Have you tried layered window on Windows 2000?

If you really want to use AlphaBlend, you can render the video into a DIB section, create a memory DC, select the DIB section in, and then use AlphaBlend to render it to screen.

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ran100Author Commented:
The layered windows is the 1M Answer.

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