Win32 controls (QWinHost) not painted on layered (ie. semi-transparent) widget (WS_EX_LAYERED)

[hdeldar]

I ported a win32 control using QWinHost, and put it on a layered (semi-transparent) widget. When I set WS_EX_LAYERED flag, then paint not occurred.
@
SetWindowLong(winId(),
GWL_EXSTYLE,
GetWindowLong(winId(), GWL_EXSTYLE) | WS_EX_LAYERED);
@

[lygstate]

I also meet this problem, looking for solutions.!