Appointment app = new Appointment(Convert.ToDateTime(tempData.Rows[0]["dtVisitFrom"].ToString()), Convert.ToDateTime(tempData.Rows[0]["dtVisitTo"].ToString()));

                                    app.BarColor = Color.Red;

                                    app.Subject = "Meeting";

                                    if ((tempData.Rows[0]["fltReminderAfterMin"]).ToString() != String.Empty)

                                    {

                                        app.Reminder.DialogText = "Reminder Reminder";

                                        app.Reminder.DisplayIntervalUnits = DisplayIntervalUnits.Minutes;

                                        app.Reminder.DisplayInterval = 5;

                                        app.Reminder.SnoozeIntervalUnits = SnoozeIntervalUnits.Minutes;

                                        app.Reminder.Enabled = true;

                                        app.Reminder.Snoozed = true;

                                        app.Reminder.Enabled = true;

                                    }

                                    ultraCalendarInfo1.Appointments.Add(app)

In this example my Reminder doesnot fires 5 mintes befor appointment ????

Can any one let me know what is not correct in these lines ???

or where I am making mistake 

Hello Frank,

The reason the Appointment reminder doesn't show up is because the CalendarInfo object sets its parent form as the parent form of the dialog.  If your application has a main windows that's always open, try putting the UltraCalendarInfo on that form and changing the modifier to internal.

For the second issue, you could create your own appointment dialog and display it when the UltraCalendarInfo.BeforeDisplayAppointmentDialog event fires.  Just make sure you set e.Cancel to true so the built-in dialog doesn't display.  You can access the Appointment object to edit with the e.Appointment property.

No, I never get a solution from Infragistics ...