How to get the changed information by using NotificationListener

I am currently trying to use slide to integrate with Exchange. I can
save contact/appt to the exchange. Now I need to be notified when people
change things in outlook, i.e. contacts/appt. What I have accomplished
is to be notified when there is a change in the exchange resource I
subscribe. But I cannot get the information about what has been changed.
For example, when the user changes the "first name" of the contacts, I
got the notification that there is a change, but I could not get the
information what has been changed. 

 

How can I get that information?

 

Thanks!

 

Zhen (Jen) Fan

901-263-3245

 

 

Zhen (Jen) Fan

901-263-3245