G_CALLBACK( dialog_button_callback ), GINT_TO_POINTER( IDOK ) );
gtk_widget_set_can_default( w, true );
gtk_widget_grab_default( w );
gtk_widget_show( w );
w = ui::Button( "Cancel" );
G_CALLBACK( dialog_button_callback ), GINT_TO_POINTER( IDOK ) );
gtk_widget_set_can_default( w, true );
gtk_widget_grab_default( w );
gtk_widget_show( w );
w = ui::Button( "Cancel" );