Question

How can I know if for any appointment “Send” was clicked or ” Send Update” or “Send Cancellation” was clicked.I have Application_ItemSend event which fires for both Send,Send Update and Send Cancellation. One way would be add a custom property and set some value when the appointment is initially created. But I don’t seem to find a way to differentiate the button click. Is adding custom property the only way or is there any built in property which I can use. Appointment item I am assigning as below.

var appointment = Globals.MedearcOutlook2010AddIn.Application.ActiveInspector().CurrentItem as Outlook.AppointmentItem;

Thanks

Answer 1

You can check the MAPI property PR_MESSAGE_DELIVERY_TIME to see whether the appointment has been sent yet (isUpdate=false) or it is an update to an existing appointment (isUpdate=true). I didn’t see a native property member for doing this.

string PR_MESSAGE_DELIVERY_TIME = "http://schemas.microsoft.com/mapi/proptag/0x0E060040";
bool isUpdate = false;
try
{
    DateTime message_delivery = appointment.PropertyAccessor.GetProperty(PR_MESSAGE_DELIVERY_TIME);
    isUpdate = true; // if it makes it here then the message has been delivered
}
catch { }