test.vala

int main (string[] args) {
    Gtk.init (ref args);

    var window = new Gtk.Window ();
    window.title = "This is my Vala test";
    window.border_width = 10;
    window.window_position = Gtk.WindowPosition.CENTER;
    window.set_default_size (350,80);

    window.destroy.connect (Gtk.main_quit);

    window.show_all ();

    Gtk.main ();
    return 0;
}