Getting the list of members in an AD group

Hi, I have the SID of an AD group. I want to get the list of members who belong to that group. All the documentation page that I search for points me to the reverse only (i.e., getting all the groups membership information of a user). Can someone show me to the relevant way to get the users who belong to a group whose SID I have ? Thanks. -- Sankar P http://psankar.blogspot.com