Get a list of groups of a user

[Rainer Standke]

Hello,
I want to get a list of groups a user is in via
System.Director yServices. This could be done with this code:

DirectoryEntry obEntry = new DirectoryEntry( "LDAP://DC=ini-
graphicsnet,DC= org");
DirectorySearch er srch = new DirectorySearch er(obEntry,
"(sAMAccountNam e=" + strUser + ")");
SearchResult res = srch.FindOne();
if (null != res)
{
DirectoryEntry obUser = new DirectoryEntry( res.Path);
// Invoke Groups method.
object obGroups = obUser.Invoke(" Groups");
foreach (object ob in (IEnumerable)ob Groups)
{
// Create object for each group.
DirectoryEntry obGpEntry = new DirectoryEntry( ob);
groups.Add(obGp Entry.Name);
}
}

It is possible to define groups in the ActiveDirectory , that are
members of groups. I want to get these "parent-groups" and add them to
my list. How can I do that?

Rainer