set a Window Maximized

[MC_Vai <estoy ver megared net mx>]

        How can I make a Window with a maximized size per
        default?

        I tried with gtk_window_set_default_size() but
        it only works with a fixed size, and what I want to
        do is to make the size of the window gets maximized
        according to the desktop's resolution.

        Thanks a lot in advance for your help.
        Regards, 

                                          - Eduardo