void SetErrorMode()
{
Gtk.Label lab = new Gtk.Label ();
lab.Markup = "<b>" + Catalog.GetString ("The form designer could not be loaded") + "</b>";
Gtk.EventBox box = new Gtk.EventBox ();
box.Add (lab);
widget = Stetic.UserInterface.CreateWidgetDesigner (box, 100, 100);
rootWidget = null;
OnRootWidgetChanged ();
}