public event AppointmentFormEventHandler EditAppointmentFormShowing

Public Event EditAppointmentFormShowing As AppointmentFormEventHandler

private void schedulerControl1_EditAppointmentFormShowing(object sender, AppointmentFormEventArgs e)
{
    MyAppointmentForm form = new MyAppointmentForm(sender as SchedulerControl, e.Appointment, e.OpenRecurrenceForm);
    try
    {
        e.DialogResult = form.ShowDialog();
        e.Handled = true;
    }
    finally
    {
        form.Dispose();
    }
}

Private Sub schedulerControl1_EditAppointmentFormShowing(ByVal sender As Object, ByVal e As AppointmentFormEventArgs) Handles schedulerControl1.EditAppointmentFormShowing
    Dim form As New MyAppointmentForm(TryCast(sender, SchedulerControl), e.Appointment, e.OpenRecurrenceForm)
    Try
        e.DialogResult = form.ShowDialog()
        e.Handled = True
    Finally
        form.Dispose()
    End Try
End Sub

// Subscribe to invoke a custom form.
schedulerControl1.EditAppointmentFormShowing += SchedulerControl1_EditAppointmentFormShowing;
// Subscribe to hide reminder icons for occurrences in the past.

this.schedulerControl1.EditAppointmentFormShowing += schedulerControl1_EditAppointmentFormShowing;
this.Shown += Form1_Shown;

' Subscribe to invoke a custom form.
AddHandler schedulerControl1.EditAppointmentFormShowing, AddressOf SchedulerControl1_EditAppointmentFormShowing
' Subscribe to hide reminder icons for occurrences in the past.

InitializeComponent()
AddHandler schedulerControl1.EditAppointmentFormShowing, AddressOf schedulerControl1_EditAppointmentFormShowing
AddHandler Shown, AddressOf Form1_Shown