public enum ContactAvailability
        {
            ucAvailabilityNone = 0,
            ucAvailabilityFree = 3500,
            ucAvailabilityFreeIdle = 5000,
            ucAvailabilityBusy = 6500,
            ucAvailabilityBusyIdle = 7500,
            ucAvailabilityDoNotDisturb = 9500,
            ucAvailabilityTemporarilyAway = 12500,
            ucAvailabilityAway = 15500,
            ucAvailabilityOffline = 18500
        }

  public enum ContactCalendarState
        {
            ucCalendarStateAvailable = 0,
            ucCalendarStateTentative = 1,
            ucCalendarStateOutsideWorkPeriod = 2,
            ucCalendarStateBusy = 3,
            ucCalendarStateOutOfOffice = 4,
            ucCalendarStateNotAvailable = 5,
            ucCalendarStateUnknown = 6
        }