[Qt-interest] Return code of QApplication::exec()

[Markus]

Hello!

If the application ends, the return code from QApplication::exec() is 0
for a normal exit. If an error occurs, the return value is greater 0.
But what is the meaning of this number? I don't set any number to the
exit() or quit() function, but what happend when the return code ist
62097 for example?

Any idea? 

Thanks an advance.

Markus