By default, the AllowAllDayEventScroll property is exAllDayEventWheelScroll. The AllowAllDayEventScroll property gets or sets a value that specifies whether the all-day event header supports scrolling. Use the ShowAllDayHeader property to show the schedule's All-Day header so all All-Day evens are shown on this header. The AllowCreateAllDayEvent property has effect only when the schedule displays no time scale. At runtime, the user can create all-day events, if the schedule view displays no time scale. When the schedule view shows several dates ( or it is resized to the minimum ), so no time scale is available, the user can create all-day events by clicking a date and dragging the mouse to the day where the event should end. The AddEvent event is fired once the user creates a new event. The AllDayEvent property indicates an all-day event. The AllowSelectCreateEvent property specifies whether the newly created event gets selected or highlighted.