private void createComboTestTypes()
{
combo_test_types = ComboBox.NewText ();
UtilGtk.ComboUpdate(combo_test_types, testTypes, "");
combo_test_types.Active = UtilGtk.ComboMakeActive(testTypes, Catalog.GetString(Constants.UndefinedDefault));
combo_test_types.Changed += new EventHandler (on_combo_test_types_changed);
UtilGtk.ComboPackShowAndSensitive(hbox_combo_test_types, combo_test_types);
}