[cpp]
#include <gtk/gtk.h>

static void window_quit(GtkButton* button, gpointer func_data) {
g_print("window quit : %s\n", (char *) func_data);
gtk_main_quit();
}

gint main(int argc, char *argv[]) {
GtkWidget * window;

gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

g_signal_connect(GTK_OBJECT(window), "destroy",
GTK_SIGNAL_FUNC(window_quit), (void *) "Bye hello world!");

gtk_widget_show(window);
gtk_main();

return 0;
}

[/cpp]