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Before i upgraded my dialogs to CExtResizableDialog, i used CStatic with the WM_CTLCOLOR message to set custom background color to labels (and also icons). With CExtResizableDialog, this color seems to be overrided by the theme color. Is there any way to avoid this? Or another way to get CStatic to use custom background color?

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The WM_CTLCOLOR windows message is handled in the CExtWS::WindowProc() method. The CExtWS template class is used as a base type for both CExtResizableDialog and CExtResizablePropertyPage classes. To get the colored static background, just override the WindowProc() virtual method in your dialog/property page class:

LRESULT CYourClass::WindowProc(
    UINT message, WPARAM wParam, LPARAM lParam )
{
    if(    message >= WM_CTLCOLORMSGBOX
        && message <= WM_CTLCOLORSTATIC
        )
    {
        HWND hWnd =
            __EXT_GET_WM_CTLCOLOR_HWND(
                wParam, lParam, message );
        ASSERT( hWnd != NULL );
        INT nCtlColor =
            __EXT_GET_WM_CTLCOLOR_TYPE(
                wParam, lParam, message );
        if( nCtlColor == CTLCOLOR_STATIC )
        {
            // DETECT YOUR COLORED STAIC HERE !!!
            if( hWnd == hWndOfYourColoredStatic )
                return
                    CDialog :: // or CPropertyPage
                        WindowProc(
                            wParam, lParam, message );
        }
    }
    return
        CExtResizableDialog :: // or CExtResizablePropertyPage
            WindowProc(
                wParam, lParam, message );
}

Okay, thanks, I will try this.

Additionally we can suggest that you try the CExtLabel class, which is an enhanced version of the CStatic control. This class allows you to use the SetBkColor() method for setting the background color.