Newbie: wxPython GUI Help - Simple Login System

[Trinity]

Hi
I am a new user to python and programming in general. I have been
experimenting with wxPython, creating simple things like a notepad
etc. I wanted to build a small program, a login system, just to help
me learn to use wxPython. However, I cannot work out how to read from
an edit box, or a user input box. For instance:

pass = testing
uPass = editBox
if (pass == uPass):
   function

So when i type in the user name, and password, then press the login
button, I want it to check to see if the user name and login is
correct. I am not sure how to read the current value of the editBox
though.

I hope that makes some kind of sense. 
Thanks,
Trinity