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. The AllowAllDayEventScroll property controls the number of rows that the all-day events header can display. The number of rows is determined using specific nibbles (4-bit groups) in its hexadecimal value:

• 5th nibble together with the least significant nibble (1st nibble): define the minimum number of rows
• 6th nibble together with the 2nd nibble: define the maximum number of rows

For instance:

• 0x11A2, specifies a minimum of 2 and a maximum of 10 (0xA), meaning the header can show between 2 and 10 rows
• 0x101191,  limits the values between 1 (0x01) and 25 (0x19)

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.