Methods for locking and unlocking an appointment.

Appointments have to be locked by the user of this class. This method can be used for this purpose.

Unlocks a locked appointment.

WAIT

This indicator specifies whether the lock attempt is to be repeated after a certain amount of time if the appointment is currently locked by another user. If this indicator is not set, the lock attempt is canceled immediately in this case.

FOREIGN_LOCK

The appointment is currently locked by another user. For more information, see the MESSAGE variables of the system parameters (SYST).

ENQUEUE_FAILURE

Either an incorrect GUID was specified during instantiation or there is a problem with lock management.

NO_APPOINTMENT_ID

The appointment that is to be locked has not yet been created on the database. Call the SAVE method to assign an ID to the appointment.