How to create a QWidget with a Tk window as parent?

[vladbogo]

I am trying to embed Qt in a Tk window. After researching I found out that this should be possible with the QWidget::create function, but I haven't been successful yet. Here is what I tried:

@
class QTkMainWindow: public QWidget {
public:
QTkMainWindow(WId win):QWidget() {
create(win, false, true);
}
};

void open(int argc, char**argv) {
/* create the Tk window - win */
...
Window w = Tk_WindowId(win);
QApplication *qapp = new QApplication(argc, argv);
QTkMainWindow *w = new QTkMainWindow(w);
w->show();
Tk_MapWindow(win);
}
@

The problem is that instead of setting the QWidget's window as the Tk one, I simply get 2 windows.What am I doing wrong?

Thanks!