Many of the needed properties for reminders don't show up at all in the
Outlook object model. For appointments you only get
ReminderMinutesBeforeStart and for other items types the reminder properties
might not be exposed at all, like with contact items.
For anything more you need to go to using CDO 1.21 or Extended MAPI or
Redemption or something else that lets you get at the undocumented
properties. If you aren't already using OutlookSpy (
www.dimastr.com) do so
and look at some appointments using the IMessage button and you'll see all
the reminder related properties (assuming a reminder has been added). The
properties won't exist on the item until a reminder has been added.
If an appointment has been set up and the reminder is set for 15 minutes
before the appointment time the
ReminderMinutesBeforeStart property will equal 15.