dialog still in topLevelWidgets() after been closed

[peter a]

Hi I`m a very much a newbie to Qt , So learning the basics of QT .
( with Qt creator 2 for a mini2440 embedded linux)

My problem !!! , I`ve made a set of pustbuttons open a set of dialog windows with :-

void myQtApp::Log_in_clicked()
{
Password * My_dialog = new Password;
My_dialog->setWindowFlags(Qt::FramelessWindowHint );
My_dialog->move(0,0);
My_dialog->exec();
//delete My_dialog;
}

The dialog above windows is an “Enter your password blocking screen”
If I close the box all looks o.k,. it vanishes from the screen and can reopen it again.

Another dialog window runs this :-

foreach (QWidget *widget, QApplication::topLevelWidgets())
{
test = widget->windowTitle();
ui->list->append(test);
} // test is a QString and list a textedit box

PROBLEM !! , I get the log in screen title appearing all the times I have run it .
So it`s not been cleared has a toplevelwidget even though the window as been closed.
The only way I`ve found to stop this is with the delete My_dialog; bit added .

Thank in advance peter