function create_range_controls ()
{
  local box1, box2, adjustment, scale, scrollbar, separator, button;
  
  win_range_controls = new (GtkWindow);
  win_range_controls.signal ("destroy", #win_range_controls = nil);
  win_range_controls.title = "range controls";
  win_range_controls.border_width = 0;
  
  box1 = new (GtkVBox);
  win_range_controls.add (box1);
  box1.show();
  
  box2 = new (GtkVBox);
  box2.spacing = 10;
  box2.border_width = 10;
  box1.pack_start (box2, TRUE, TRUE, 0);
  box2.show();
  
  adjustment = gtk_adjustment_new (0, 0.0, 101.0, 0.1, 1.0, 1.0);
  
  scale = new(GtkHScale);
  scale.set_adjustment(adjustment);
  scale.set_usize(150, 30);
  scale.set_update_policy(GTK_UPDATE_DELAYED);
  scale.set_digits(1);
  scale.set_draw_value(TRUE);
  box2.pack_start(scale, TRUE, TRUE, 0);
  scale.show();
  
  scrollbar = new(GtkHScrollbar);
  scrollbar.set_adjustment(adjustment);
  scrollbar.set_update_policy(GTK_UPDATE_CONTINUOUS);
  box2.pack_start (scrollbar, TRUE, TRUE, 0);
  scrollbar.show();
  
  separator = new(GtkHSeparator);
  box1.pack_start(separator, FALSE, TRUE, 0);
  separator.show();
  
  box2 = new (GtkVBox);
  box2.spacing = 10;
  box2.border_width = 10;
  box1.pack_start (box2, FALSE, TRUE, 0);
  box2.show();
  
  button = new(GtkButton);
  button.label = "close";
  button.signal("clicked", `(@win_range_controls).destroy());
  box2.pack_start (button, TRUE, TRUE, 0);
  button.can_default = TRUE;
  button.grab_default();
  button.show();      

  win_range_controls.show_all();
  win_range_controls;
}

function main ()
{
  local window, win_range_controls;
  TRUE=1;
  FALSE=0;
  window = create_range_controls ();
  window.signal ("destroy", #exit_program(0));
  init_ipc("range_con", "range_conq");
  gtk_main ();
}