Kill a process under Windows?

Hi,
How do I kill a process under windows(XP),
I do a wxExecute() .....ok!
pid = wxExecute(app, wxEXEC_ASYNC)

I tried to use wxKill ..... not working!
result = wxKill(pid, wxSIGKILL)

is there a way to do this, I looked in python doc. and found kill(), but it
was for Unix..

Thanx
Holmis