Determines whether the right border is displayed for the appointment.
true if the right border is displayed for an appointment; otherwise, false.
If an appointment lasts several days, visually it can be divided into several parts - one part for each day. For horizontal appointments, this display is possible in the Multi-Week (Month) view. If the appointment starts in one week and continues in another, the Month view splits that appointment by two rows. The appointment section in the first row has no right border (the HasRightBorder property returns false).