By default, the HideSel property is False, which means that the selected dates are still shown when the control loses the focus. Use the HideSel property to show no selected dates in the calendar panel, when the component loses the focus. If the HideSel property is False ( by default ) , the Background(exCalendarSelBackColorUnFocus) specifies the visual appearance of the selected dates when the component is not focused. The Background(exCalendarSelForeColorUnFocus) property indicates the foreground color of the selected dates when the control loses the focus. The FocusDate property indicates the  DATE in the calendar panel which is focused. 

The AllowSelectDate property indicates the keys combination so the user can select new dates in the calendar panel, and so, new dates to be shown in the schedule view. 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.