Alt+f4 combination in windows application

[Kaluss]

Hello Guys,
I got small problem with my app.
What I should do to capture "alt+f4" event and assign to it my own acction.
I use QMainWindow class.
I will be gratefull 4 any tips.

[spirit]

You should reimplement QWidget::closeEvent.

[Kaluss]

Thanks it works fine !

[Kaluss]

But now I have another problem:
<code>
void QWidget::closeEvent(QCloseEvent *event)
{
event->ignore();
}
</code>
How can I now gain access to action from my own QMainWindow ?
Is there any simple way ?

[spirit]

Didn't get what an action do you mean.

[Kaluss]

In my own main window when someone click on close option, it will start action which display new QDialog window with question like "Do u really want to quit?" Yes|No

[spirit]

See Main window example (http://qt-project.org/doc/qt-4.8/mainwindows-application-mainwindow-cpp.html). Especially how MainWindow::closeEvent works.