static void hello (GtkWidget *widget, gpointer data)

    g_print ("%s\n", (char *)data);

 

int main (int argc, char* argv[])

    /* first thing first */

    gtk_init (&argc, &argv);

 

    /* window object */

    GtkWidget* window = gtk_window_new (GTK_WINDOW_TOPLEVEL);

    gtk_window_set_title (GTK_WINDOW (window), "Hello, GTK!");

    gtk_widget_set_size_request (window, 320, 200);

    gtk_container_set_border_width (GTK_CONTAINER (window), 10);

    gtk_window_set_resizable (GTK_WINDOW (window), FALSE);

    gtk_window_set_position (GTK_WINDOW (window), GTK_WIN_POS_CENTER_ALWAYS);

    g_signal_connect (G_OBJECT (window), "delete_event",

                      G_CALLBACK (gtk_main_quit), NULL);

    gtk_widget_show (window);

 

    /* a container */

    GtkWidget *box = gtk_box_new (FALSE, 0);

    gtk_container_add (GTK_CONTAINER (window), box);

    gtk_widget_show (box);

 

    /* two buttons */

    GtkWidget *button1, *button2;

    button1 = gtk_button_new_with_label ("Hello, World!");

    g_signal_connect (button1, "clicked", G_CALLBACK(hello), "Hello, World!");

    gtk_box_pack_start(GTK_BOX (box), button1, TRUE, FALSE, 0);

    gtk_widget_show (button1);

 

    button2 = gtk_button_new_with_label ("Hello, GTK!");

    g_signal_connect (button2, "clicked", G_CALLBACK(hello), "Hello, GTK!");

    gtk_box_pack_start (GTK_BOX (box), button2, TRUE, FALSE, 0);

    gtk_widget_show (button2);

 

    /* main loop start */

    gtk_main ();

 

    return 0;