Child always on top on XP

[mpi]

How come, in the example below, the label widget always is on top of its parent widget when running on XP? On Linux, however, the two widgets are completely independent.

The reason why I set up thing as I do, is that I want the child widget to be closed automatically when the parent widget is closed.

#include <QApplication>
#include <QLabel>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
    QWidget *widget = new QWidget;
    widget->show();
 
    QLabel *label = new QLabel("Label", widget, Qt::Window);
    label->show();
 
    return app.exec();
}

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QWidget *widget = new QWidget;
    widget->show();

    QLabel *label = new QLabel("Label", widget, Qt::Window);
    label->show();

    return app.exec();
}

To copy to clipboard, switch view to plain text mode 

[aamer4yu]

What if you remove the Qt::Window flag ?

[mpi]

Then the child widget is layout inside the parent widget. I want it to be a separate window with its own frame etc.