Determine where the user clicked on the calendar

I have written a VSTO Outlook addin in VS2008 using Outlook 2007.  I
need to catch the "click" event for the date that a user has clicked
upon on the screen.  Does anyone know which even on which object
(ActiveExplorer ???) that I need to catch in order to know the date
that a user has selected from the currently displayed calendar?

Thanks for your time.


-Morna