 GIF, JPEG, PNG), video files (AVI, MPG etc), Office documents 
(DOC, PPT, XLS, WMF), Web pages (HTML, MHT) and e-mail messages (EML). Note that 
Office documents can be previewed only if they've been saved with an embedded 
preview picture - you need to check the box in the Properties dialog to enable this.</p><p>However, other thumbnail extractors can be freely added to the system (sample
coming soon) so you might have the ability to preview other files.  Whilst its probably possible to check whether ther