gala minimize windows

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

        var screen = Wnck.Screen.get_default ();
        screen.force_update ();
        var workspace = screen.get_active_workspace ();
        foreach (var window in screen.get_windows ())
                if (window.get_workspace () == workspace &&
                        (window.get_window_type () == Wnck.WindowType.NORMAL ||
                        window.get_window_type () == Wnck.WindowType.DIALOG))
                        window.minimize ();
}