property Calendar.AllowSelectDate as AllowKeysEnum
Specifies the combination of keys that allows the user to select dates in the calendar panel.

TypeDescription
AllowKeysEnum An AllowKeysEnum expression that specifies the combination of keys that allows the user to select new dates, in the calendar panel, and so to display a different dates in the schedule view.
By default, the AllowSelectDate property is exLeftClick. The exDisallow indicates the the user can not select dates in the calendar panel. Once the user starts selecting a new date in the calendar panel, the control fires the LayoutStartChanging(exCalendarSelectionChange). Once a new date is selected, the LayoutEndChanging(exCalendarSelectionChange) event occurs. The SingleSel property indicates whether the user can select one or multiple dates. The AllowSelectDateRect specifies the keys combination so the user can do a rectangular selection in the calendar panel. Use the Selection/SelectDate property to change programmatically the dates being selected in the calendar, including the dates to be shown in the schedule view. You can use the Selection/SelCount/SelDate property to retrieve the selected dates. 

The ClipToSel property indicates whether the control clips the schedule panel to view the selected dates only. The FitSelToView method restores the view to fit the selected dates.