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I need to draw an animation file (.avi) in a prof-uis themed dialog apps. How can I draw a transparent background of .avi to reproduce prof-uis theme ? Alternatively, is there a control, in prof-uis classes, I can use?

Tx a lot

The background of all controls and dialogs is based on bitmaps or gradients, which depend on the current paint manager (theme).

You can paint a valid background compatible with the dialog background and current theme by using the following code:

    CExtMemoryDC dc(
        &dcPaint,
        &rcClient
        );

    // draw themed background
    bool bTransparent = false;
    if( g_PaintManager->GetCb2DbTransparentMode( this ) )
    {
        CExtPaintManager::stat_ExcludeChildAreas(
            dc,
            GetSafeHwnd(),
            CExtPaintManager::stat_DefExcludeChildAreaCallback
            );
        if( g_PaintManager->PaintDockerBkgnd( true, dc, this ) )
            bTransparent = true;
    }
    if( ! bTransparent )
        dc.FillSolidRect(
            &rcClient,
            g_PaintManager->GetColor( CExtPaintManager::CLR_3DFACE_OUT, this )
            );


    //////////////////////////////////////////////////////////////////////
    // PLACE CONTROL PAINTING CODE HERE
    //////////////////////////////////////////////////////////////////////

Please note Prof-UIS comes with the AviFrames sample where you can see how to read and display avi files.