The main classes for working with the RadDatePicker control are:
RadDatePicker is the main class for the date picker control. It provides several properties, methods, and events for customizing the control.
RadDateInput is the class for the input area of RadDatePicker. It handles the formatting and parsing of date and time strings, and has a number of its own properties, methods and events. RadDateInput is one of the standard RadInput controls.
CalendarPopupButton is the class for the popup button that displays the calendar on RadDatePicker. It is exposed by the DatePopupButton property.