How to disable QWidget managing the mouse cursor shape?

I have an in-place activated Flash Player, which contents I draw to a QWidget. Sometimes, the Flash Player tries to change the default mouse cursor to a "hand" cursor. However, QWidget seems to change it back, so it is flickering. How can I disable this behavior? Or create a dumb QWidget that only provides a HWND doesn't do anything else (besides being possible to add to another QWidgets as a child?)

Have you tried QWidget::unsetCursor()?