I've got a databinded ultradayview.
When dragging appointments using the CTRL key, the appointment get's copied.
How do i get the original appointment the copied appointment was cloned from?
i think in the dragDrop event of the control you will have e.CopiedAppointments and e.Appointments.
Get your original appointments by accessing e.Appointments. If this object returns null then I suggest binding an unique identifier to each appointment before adding them (something like appointment.Tag = myUniqueId) and after that just check when you have a new copy where it came from.
Hope it helps!