how can i change the default "New Appointment" text after double click on the ultradayview to custom default text ...
You can handle the UltraCalendarInfo.BeforeDisplayAppointmentDialog event, and change properties of the associated Appointment before the dialog appears.
Example:private void calendarInfo_BeforeDisplayAppointmentDialog(object sender, DisplayAppointmentDialogEventArgs e){ e.Appointment.Subject = "Testing 1 2 3";}