void on_button_accept_clicked(object o, EventArgs args)
{
int eventID = Convert.ToInt32 ( label_event_id_value.Text );
string myPerson = UtilGtk.ComboGetActive(combo_persons);
string [] myPersonFull = myPerson.Split(new char[] {':'});
string myDesc = entry_description.Text;
updateEvent(eventID, Convert.ToInt32(myPersonFull[0]), myDesc);
hideWindow();
}