I got it, all I have to do is to use the following code:

 

Private Sub CalendarControl_EventChangedEx(ByVal pEvent As XtremeCalendarControl.CalendarEvent)
    Set pEvent = CalendarControl.DataProvider.GetEvent(pEvent.Id)
   
    ' pEvent Is Nothing for recurrence Ocurrence and Exception.
    ' See CalendarControl_PatternChanged for recurrence events changes.
    If Not pEvent Is Nothing Then
        frmEditEvent.ModifyEvent pEvent
        frmEditEvent.Show
        Exit Sub
    End If

End Sub

I do have a calendar with a multiple schedules (user 1, user 2 and user 3), and I wanted to display a confirmation message to the end user in he decides to move an event from user 3 to another user. ( I am using almost the same form that comes with calendarcontrol sample to add/edit event, and I prefered that this form will be loaded every time a user try to move an event from 1 user to another user within the calendar)

please tell me how?

Thank you