In multi-domain how fetch user/group in each domain.

[Asit Sinha]

Respected sir
I have a dialog box. In dialog box show domain users and groups.
But our requirements is if there are several domain and in each domain have users/Groups.
Then how I fetch this information.
In our code I am using active directory code is

Utility.GetDirectoryInfo("LDAP://ABC", "Administrator", "Admin")

After that fetch the groups with this code.

Public Function getAllGroups() As TreeNode
        Dim WinID As System.Security.Principal.WindowsIdentity
        WinID = Security.Principal.WindowsIdentity.GetCurrent()
        Dim User As New System.Security.Principal.WindowsPrincipal(WinID)
        Try
            Dim _AllGroups As ArrayList
            Dim _AdGroup As ADGroup
            _AllGroups = ADManager.Instance.LoadAllGroups

            Dim i As Short = 0
            For i = 0 To _AllGroups.Count - 1
                _AdGroup = _AllGroups(i)
                GroupNode.Nodes.Add(New TreeNode(_AdGroup.Name, 3, 3))
            Next
        Catch ex As Exception
            Throw ex
        End Try
        Return GroupNode
    End Function

This code is work perfectley.
But in case of multi domain is not work.So please suggest me how I fetch information in case of multi-domain and multi-domain user and group.
Please immediate reply me.
Thank
Asit Sinha