Trapping powerpoint 2010 events while doing presentation

Question

Is there a way I can trap event when a presenter switches to a slide on MS power point 2010

Answer 1

Figured out myself.

We can do that using VSTO. Below link has some information to get started

http://msdn.microsoft.com/en-us/library/bb960904(office.12).aspx#PPT2007CreatingAddIns_ReactingtoanApplicationLevelEvent