gtk_box_pack_start(GTK_BOX(event_viewer_data->hbox_v), event_viewer_data->vscroll_vc, FALSE, TRUE, 0);
/* Get the vertical scrollbar's adjustment */
gtk_box_pack_start(GTK_BOX(event_viewer_data->hbox_v), event_viewer_data->vscroll_vc, FALSE, TRUE, 0);
/* Get the vertical scrollbar's adjustment */