System Path of "My Document"

Hi,

    In my application user will click "My Document" Icon provided by me in a windows forms.
What I need to do is that when user clicks "My Document" I need to take the "My Document" folder of that PERTICULAR USER and save it to the server.

My problem is that there may be no. of user for that system and each user will be having his won "My Document" .

So how to get that perticular user's "My Document" folder. Is there somewhere in the system only from where we can get the path for "My Document" folder of that user.

plz do help if someone has any Idea.

Suraj