Windows: Disabling Press&Hold using SetProp for MicrosoftTabletPenServiceProperty breacks touch for QMenu

class ApplicationEventFilter : public QObject
{
public:
    bool eventFilter (QObject * obj, QEvent * event) {        
        switch (event->type ()) {
        case QEvent::Show:
        case QEvent::WinIdChange:
        {
            if (obj->isWidgetType () && (((QWidget *)obj)->effectiveWinId() != 0)) {
                HWND hWnd = (HWND) ((QWidget *)obj)->effectiveWinId();
                qDebug ("HWND: %lld", (qint64)hWnd);                
                ATOM atomID = 0;
                LPCTSTR tabletAtom = TEXT("MicrosoftTabletPenServiceProperty");                  
                atomID = GlobalAddAtom (tabletAtom);
                if (atomID != 0) {
                    SetProp (hWnd, tabletAtom, reinterpret_cast <HANDLE> (1));
                    GlobalDeleteAtom (atomID);
                }
            }
        }
        break;
        default:
            break;
        }
        return QObject::eventFilter (obj, event);
    }
};