title: how to check if a presentation is 2007 or 2010?
body: <p>I need to find if a presentation was made using PowerPoint 2010 or 2013, in order to look for certain features in the presentation that only apply to PowerPoint 2013 (for example YouTube embedded videos).</p>
  
  <p>I am using  interop and c# to look at the presentation.</p>
  
  <p>thanks in advance!</p>