vca_vpacker.pack_start (vca_label_bar, false, false);
vca_scroller_base.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
vca_vpacker.pack_start (vca_label_bar, false, false);
vca_scroller_base.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);