the problem isn't resizing the window... the problem is doing it in such a way that the graphics within the wow window look correct, and not squashed or stretched... basically, a circle would look like a circle, and not an egg or football.
ie:
http://solidice.com/keyclone/keyclone_v1.8e_pip_1.jpg
or
http://solidice.com/keyclone/maximizer_01.jpg