ASP.NET - GET GROUP NAME FROM LDAP BASE ON LOGGED USER NAME.

Question

Dear All!

I am not very familiar with working with LDAP. I have created a webapp integrated with LDAP, logged OK. I want to get the group name of a logged user, how can i do that?
I did search on google and have read the article from codeproject, but it doesn't help me to find out the group name. any responses will be very appreciated!

Many thanks
Hoang An