SetAppointment

Sets the appointment that is to be edited in the form.

SetDates

Sets the dates to be used to initialize the form if no appointment is initially set.

ApplyItemChanges

Called when the user presses the 'Save and Close' button to apply the changes to the appointment.

ApplyRecurrenceChanges

Called when the user presses the 'Save and Close' button to apply the changes to the appointment's recurrence.

Dispose

Clean up any resources being used.