gtk-1.c

#include <gtk/gtk.h>

int main (int argc, char **argv)
{
  gtk_init (&argc, &argv);
  GtkWidget *window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW (window), "Hello");
  gtk_widget_show (window);
  gtk_main ();
  return 0;
}