Carlos,
I'd warn you though that not all users are going to appreciate this behavior. My system here has a display 1920x1200 and if a little form designed to fit in 800x600 suddenly took over my whole screen I for one would not use the app.
>I do It, but
>if I complile my aplication on resolution 800x600, and run on other computer with a different resolution my interface is not set automatic