Questions about wxPython...

[Helmutt]

Hi all!
I'm trying to learn myself wxPython, and I got some questions:

Whats the name of the event that occur when I press the
exit/cross-button on the frame?
How do I connect a function with that event?
How do I start a new process of the same program I'm running? I do not
want to create a new frame, I want to start a new process of the
program I'm running, but I don't want the first instance to wait for
the other.

Can somebody help?