void
on_winmain_destroy                     (GtkObject       *object,
                                        gpointer         user_data)
{
	 // obtenir le pointeur de window1
GtkWidget * winmain = gtk_widget_get_toplevel(GTK_WIDGET(object));

// obtenir le pointeur de la fenetre info
GtkWidget * winask = gtk_object_get_data (GTK_OBJECT (winmain), "info_window");

// afficher la fenetre info
  gtk_widget_show(winask);
}

void
on_btnreturn_clicked                    (GtkButton       *button,
                                        gpointer         user_data)
{
	GtkWidget *winask;
	gtk_widget_destroy();
   gtk_widget_show(create_winmain());

}
void
on_btnquit_clicked                    (GtkButton       *button,
                                        gpointer         user_data)
{
	gtk_main_quit();
}