how can I execute some code before mainwindow is close

[patcito]

Hey all,
I would like to execute a QDialog when the user close the main window of the application (by clicking on the cross at the top right of the window for most people). How could I do that?
thanx in advance

Pat

[jpn]

Override mainwindow's closeEvent(), launch the dialog in there and possibly accept or ignore the event according to the dialog result.