Why doesn't UR use built-in viewers?

[RAlfieri]

I'm curous why I cannot see thumbnails for Office documents using the built-in Windows viewers. Also, I was wondering why PDF's show text, but the native PDF is not viewable in UR. I would prefer to see the document preview.

Thanks for any guidance.

Regards,
Rob

[kinook]

http://www.kinook.com/UltraRecall/Manual/internaloleedit.htm

http://www.kinook.com/Forum/showthread.php?threadid=1042

http://www.kinook.com/Forum/showthread.php?threadid=2430