rem: gtk_toggle_button_set_active ( GTK_TOGGLE_BUTTON ( checkbox ), TRUE );
add: gtk_object_set_data ( GTK_OBJECT ( checkbox ), "hook", g_signal_connect ( GTK_OBJECT ( checkbox ), "toggled", GTK_SIGNAL_FUNC ( hook ), data ));
context: new_checkbox_with_title ( gchar * label,			  guint * data ){  GtkWidget * checkbox;  checkbox = gtk_check_button_new_with_label ( label );  if (data && *data)    {      gtk_toggle_button_set_active ( GTK_TOGGLE_BUTTON ( checkbox ),				     TRUE );          }  gtk_signal_connect ( GTK_OBJECT ( checkbox ), "toggled",		       GTK_SIGNAL_FUNC ( set_boolean ), data );  /* FIXME: deactivate when we will be full "implicit apply" */  gtk_signal_connect_object ( GTK_OBJECT ( checkbox ),			      "toggled",			      activer_bouton_appliquer,			      GTK_OBJECT (fenetre_preferences));  gtk_widget_show ( checkbox );    return checkbox;}