Calendar Explorer time range selections

Bear with me, this is hard to describe.

I'm a fairly knowledgeable VB(A) developer. I understand basic concepts. I
say this because what I need to do sounds simple, but I can't find
documentation on it *anywhere*.

What I'm trying to do is implement a custom app using the Outlook Calendar.
All I want to do is select a time range in the Calendar and create a
MeetingItem object using the selected time range. Where does this time range
exist? The Explorer's Selection object has no members (because no items are
selected.) I can find very little specific documentation about the variations
of Explorer objects used in Outlook.

Am I just overlooking the obvious, or do I need to use CDO or similar to
gain access to additional fields? Thanks in advance.