Popup window / VSTGUI 4.3 / Not using UIDesc

I managed to get it working on Windows by modifying Win32Frame constructor:

if (parent == NULL)
windowHandle = CreateWindowEx (style, gClassName, TEXT(“Window”),
WS_POPUP | WS_BORDER | WS_VISIBLE | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
size.left, size.top, (int)size.getWidth (), (int)size.getHeight (),
parentWindow, NULL, GetInstance (), NULL);
else
windowHandle = CreateWindowEx(style, gClassName, TEXT(“SynthMaster 3”),
WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
0, 0, (int)size.getWidth(), (int)size.getHeight(),
parentWindow, NULL, GetInstance(), NULL);