Is it possible to catch event "Word document editing started"

[Rimantas Varanavicius]

Hello,

I need to find out programatically the moment when user starts editing the
MS Word document (later I will need the same with excel and ppt docs), that I
have opened programatically. I'm writting my Com AddIn with C#.
Is it possible? I was unable to find such event in Word Object Model. But
maybe I was looking in wrong place. Or maybe some of you have solved similar
problem in some other smart way?
Thank you.

regars,
Rimantas Varanavicius