Querying LDAP in VB.NET. I have the user account, and I want a list of groups the user in in

I know the SAMAccountName, and now want to populate a list of groups with entries that reflect this user's group membership across the whole directory. Here's my start, but I'm stumped:

        Dim path As String = WebConfigurationManager.AppSettings("ldapPath")
        Dim entry As New DirectoryEntry(path)
        Dim search As DirectorySearcher = New DirectorySearcher(entry)
        Dim groupList As StringBuilder = New StringBuilder()
        search.Filter = "(SAMAccountName=" & _thisUser.UserName & ")"
        search.PropertiesToLoad.Add("memberOf")
        'search.SearchScope = SearchScope.Subtree

        For Each res As SearchResult In search.FindAll
        Next  ''Just doing this so I can look at "res" objects in debug

I've no idea how to traverse this. Please, any pointers?

If you're on .NET 3.5 and up, you should check out the System.DirectoryServices.AccountManagement (S.DS.AM) namespace. Read all about it here:

• Managing Directory Security Principals in the .NET Framework 3.5
• MSDN docs on System.DirectoryServices.AccountManagement

Basically, you can define a domain context and easily find users and/or groups in AD:

// set up domain context
using (PrincipalContext ctx = new PrincipalContext(ContextType.Domain))
{
    // find a user
    UserPrincipal user = UserPrincipal.FindByIdentity(ctx, yourSamAccountName);

   if(user != null)
   {
        var groups = user.GetGroups();

        // iterate over groups or do whatever else you need to do....
   }
}

The new S.DS.AM makes it really easy to play around with users and groups in AD!