http://kmlinux/~culik/wiki

    GtkWidget * box = 
       gtk_hbox_new (FALSE, 8);
 
    button = gtk_button_new_with_label ("Hello World");
 
    GtkWidget * button2 = 
      gtk_button_new_with_label ("Second Button");
 
    GtkWidget * button3 = 
      gtk_button_new_with_label ("Third Button");
 
    gtk_container_add (GTK_CONTAINER (window), box);
 
    gtk_container_add (GTK_CONTAINER (box), button);
    gtk_container_add (GTK_CONTAINER (box), button2);
    gtk_container_add (GTK_CONTAINER (box), button3);

    gtk_widget_show_all (window);