Win32: UpdateLayeredWindow sometimes does not work (error 317)

Question

I have a strange problem here. I am showing a translucent splash screen (.png file) using layered windows. It works on some machines, but not on others. On machines where it does not work, GetLastError returns 317 (which is not very useful). Has anyone experienced this before? Here are my respective functions. The input parameters for CreateAsPNG are WS_VISIBLE | WS_POPUP (dwStyle), 0 (dwExStyle) and a handle handle to the hidden tool window for the parent, so no taskbar entry is created. I checked that I can load the embedded PNG resource into CImage and that the image size is correct.

Thanks in advance for your help!

BOOL MySplashWnd::CreateAsPNG( DWORD dwStyle, DWORD dwExStyle, const CString& sTitle, HWND hWndParent )
{
    ATL::CImage img;
    CreateStreamOnResource( m_nBitmapID, img );

    m_nWndWidth = img.GetWidth();
    m_nWndHeight = img.GetHeight();

    int nTop = 0;
    int nLeft = 0;
    GetTopLeft( nTop, nLeft );

    dwExStyle |= WS_EX_LAYERED;

    // Create the Splash Window
    BOOL bRetVal = CWnd::CreateEx( dwExStyle, AfxRegisterWndClass( CS_CLASSDC ), sTitle,
                                  dwStyle, nLeft, nTop, m_nWndWidth, m_nWndHeight, hWndParent, NULL );

    //Couldn't create the window for some unknown reason...
    X_ASSERT( bRetVal != FALSE );

    if ( bRetVal )
    {
        HDC hScreenDC = ::GetDC( m_hWnd );
        HDC hDC = ::CreateCompatibleDC( hScreenDC );
        HBITMAP hBmp = ::CreateCompatibleBitmap( hScreenDC, m_nWndWidth, m_nWndHeight );
        HBITMAP hBmpOld = ( HBITMAP ) ::SelectObject( hDC, hBmp );

        img.Draw( hDC, 0, 0, m_nWndWidth, m_nWndHeight, 0, 0, m_nWndWidth, m_nWndHeight );

        BLENDFUNCTION blend = { 0 };
        blend.BlendOp = AC_SRC_OVER;
        blend.BlendFlags = 0;
        blend.SourceConstantAlpha = 255;
        blend.AlphaFormat = AC_SRC_ALPHA;

        POINT ptPos = { nLeft, nTop };
        SIZE sizeWnd = { m_nWndWidth, m_nWndHeight };
        POINT ptSource = { 0, 0 };

        if ( ::UpdateLayeredWindow( m_hWnd, hScreenDC, &ptPos, &sizeWnd, hDC, &ptSource, 0, &blend, ULW_ALPHA ) )
        {
        }
        else
        {
            // The last error value is 317 on some Win7 machines.
            TRACE( _T( "*** Last error: %d\n" ), ::GetLastError() );
        }

        ::SelectObject( hDC, hBmpOld );
        ::DeleteObject( hBmp );
        ::DeleteDC( hDC );
        ::ReleaseDC( NULL, hScreenDC );
    }

    return bRetVal;
}

void MySplashWnd::CreateStreamOnResource( UINT nIDRes, ATL::CImage& img )
{
    HINSTANCE hInstance = ::GetMUIResourceInstance();
    if ( hInstance == NULL )
    {
        return;
    }

    HRSRC hResource = ::FindResource( hInstance, MAKEINTRESOURCE( nIDRes ), "PNG" );
    if ( hResource == NULL )
    {
        return;
    }

    DWORD dwResourceSize = ::SizeofResource( hInstance, hResource );
    if ( dwResourceSize == 0 )
    {
        return;
    }

    HGLOBAL hImage = ::LoadResource( hInstance, hResource );
    if ( hImage == NULL )
    {
        return;
    }

    LPVOID pvImageResourceData = ::LockResource( hImage );
    if ( pvImageResourceData == nullptr )
    {
        return;
    }

    HGLOBAL hImageData = ::GlobalAlloc( GMEM_MOVEABLE, dwResourceSize );
    if ( hImageData == NULL )
    {
        return;
    }

    LPVOID pvImageBuffer = ::GlobalLock( hImageData );
    if ( pvImageBuffer != nullptr )
    {
        ::CopyMemory( pvImageBuffer, pvImageResourceData, dwResourceSize );
        ::GlobalUnlock( hImageData );

        IStream* pStream = nullptr;

        if ( SUCCEEDED( ::CreateStreamOnHGlobal( hImageData, TRUE, &pStream ) ) )
        {
            img.Load( pStream );
            pStream->Release();
        }

        ::GlobalUnlock( hImageData );
    }

    ::GlobalFree( hImageData );
} // CTTSplashWnd::CreateStreamOnResource

UPDATE: , , UpdateLayeredWindow ( 317, ). , . , ...

Answer 1

, . SetWindowAttributes, SetLayeredWindow. , API , , , msdn . , OpenGL, , , CreateDIBSection CreateCompatibleBitmap, , , .

Answer 2

UpdateLayeredWindow() Windows 7 x86_64 , . ,

UpdateLayeredWindow (window_handle, NULL,
                     &position, &size,
                     buffer_hdc, &buffer_offset,
                     0, &blend_options, ULW_ALPHA);

,

UpdateLayeredWindow (window_handle, NULL,
                     &position, NULL,
                     buffer_hdc, &buffer_offset,
                     0, &blend_options, ULW_ALPHA);

317.

, , . .

, , DC, .