Layered Windows and things drawing through them

From:

=?Utf-8?B?R29sdW0yNTY=?= <Golum256@discussions.microsoft.com>

Newsgroups:

microsoft.public.vc.language

Date:

Sat, 7 Apr 2007 09:30:00 -0700

Message-ID:

<EC1AF278-C108-48AA-957E-D26695D07C90@microsoft.com>

First off let me apologize if I am submitting this to the wrong group...

I want my window to fade into view when they are shown, then fade out
later... so I wrote the below snippet of code to react to a timer...

    if ( mCurrentAlpha <= 0 ) {
        // We have hidden the window so let's get it in a good state...
        KillTimer( mTimerIndex );
        FadeOutComplete();
        mCurrentAlpha = 0;
        ShowWindow( SW_HIDE );
        ::SetLayeredWindowAttributes( GetSafeHwnd(), mOurColorRef, LWA_ALPHA, 0 );

        // Turn off the layered style...
        SetWindowLong( GetSafeHwnd(), GWL_EXSTYLE, GetWindowLong(GetSafeHwnd(),
GWL_EXSTYLE) & ~WS_EX_LAYERED );
        TurnOff( GetSafeHwnd() );
    }
    else if ( mCurrentAlpha > 255 ) {
        // We have shown the window so let's get it in a good state...
        SetLayeredWindowAttributes( mOurColorRef, 255, LWA_ALPHA );
        KillTimer( mTimerIndex );
        FadeInComplete();
        mCurrentAlpha = 255;
        ::SetLayeredWindowAttributes( GetSafeHwnd(), mOurColorRef, LWA_ALPHA, 0 );

        // Turn off the layered style...
        SetWindowLong( GetSafeHwnd(), GWL_EXSTYLE, GetWindowLong(GetSafeHwnd(),
GWL_EXSTYLE) & ~WS_EX_LAYERED );
        TurnOff( GetSafeHwnd() );
    }
    else {
        // Time to step the alpha!!!
        SetLayeredWindowAttributes( mOurColorRef, (BYTE)mCurrentAlpha, LWA_ALPHA );
        Invalidate();
        mCurrentAlpha += mAlphaStep;
    }
}

This works great, HOWEVER... I keep getting controls from windows below me
drawing above my window... NOT the entire window from below, just some of
it's controls. My window is created with the topmost flag.

I am currently in the code trying to turn off the Layered window attribute
when I don't need it ( to see if that would help ).... but it doesn't

Anyone have any idea how I can fix this?

TIA