ASP.NET and Office apps, track filesize changes

[mikejacobz]

Hi, I have an asp.net application (1.1) and when a user clicks on a
link it opens up a word document. A user can then make changes to the
doc and then close the document;

My app needs to track the size of the document when a user closes the
doc, if it has changed then we can assume that the doc has been
modified in some way.

I am probably right when I assume that there is no way my asp.net page
can be informed that the word doc is closing so what would be the best
way to tackle the above problem?

Thanks for any advice
Mike

[mikejacobz]

Hi, thanks for the suggestions :)
Regards
Mike