how does the main module notice when I change a module

[Marcus Schneider]

I use PythonWin on WinXP. Every time I change a module, I have to
leave PythonWin and re enter to make it notice I have made changes. I
guess this is not the normal way to do that.. do I have to store the
module at a specific place? Is there a kind of "reset" command to make
the main module update specific data?