problem in gtk programming

[dark0s Optik]

I am triyng to programming with gtk over DragonFly.
My sample code is the follows:

#include <gtk/gtk.h>

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

  GtkWidget *window:

  gtk_init(&argc, &argv);

  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  gtk_widget_show(window);

  gtk_main();

  return 0;

}

The gcc output is:

#gcc prova.c -o prova
1:21: error: GtkWidget undeclared
5: error: window undeclared
9: GTK_WINDOW_TOP_LEVEL undeclared

#find / -name gtk.h
/usr/pkg/include/gtk-2.0/gtk/gtk.h
/usr/pkg/include/gtk-1.2/gtk/gtk.h

I mistake in including library?

What is the problem?

Regards,
savio

-- 
only the paranoid will survive