Thank you for writing.
You have to create a class that inherits EditRecurrenceDialog. In addition, it is important to have constructors that call the base constructors.
recurrenceDlg(IEvent appointment, ISchedulerData schedulerData)
In order to show this dialog, you have to subscribe to the RecurrenceEditDialogShowing event of the RadScheduler and set an instance of the custom recurrence dialog to the arguments.
sender, RecurrenceEditDialogShowingEventArgs e)
In case that you have other related questions, feel free to write back.
the Telerik team
Q3’10 SP1 of RadControls for WinForms is available for download
; also available is the Q1'11 Roadmap
for Telerik Windows Forms controls.