Determining a User's Group Membership

Allain found this online

Function IsMember(strDomain As String, strGroup _
  As String, strMember As String) As Boolean
  Dim grp As Object
  Dim strPath As String

  strPath = "WinNT://" & strDomain & "/"
  Set grp = GetObject(strPath & strGroup & ",group")
  IsMember = grp.IsMember(strPath & strMember)
End Function

You can get the Windows account info by way of the USERDOMAIN and USERNAME environment vars:

Function GetCurrentUser() As String
    GetCurrentUser = Environ("USERNAME")
End Function

Function GetCurrentDomain() As String
    GetCurrentDomain = Environ("USERDOMAIN")
End Function

Putting it all together:

If IsMember(GetCurrentDomain, "AD Group", GetCurrentUser) Then
   DoStuff()
End If

I'm late to the game with this, but the code you need is below. It gets user names and domain names for you.

Note that I'm not using objGroup.Ismember - that's actually the correct method to use - I'm enumerating the list of groups that the user is in, because it's much easier to debug and there's no appreciable performance penalty.

...And I lifted the code from an earlier project, in which I needed to check membership of a 'Read Reports' group, an 'Edit Data' Group, and an 'Edit System Data' group, so that I could choose which controls to enable and which forms to open read-only. Enumerating groups once was faster than three separate checks.

Public Function UserIsInGroup(GroupName As String, _
                              Optional Username As String, _
                              Optional Domain As String) As Boolean
'On Error Resume Next

' Returns TRUE if the user is in the named NT Group.

' If user name is omitted, current logged-in user's login name is assumed.
' If domain is omitted, current logged-in user's domain is assumed.
' User name can be submitted in the form 'myDomain/MyName' 
'                                        (this will run slightly faster)
' Does not raise errors for unknown user.
'
' Sample Usage: UserIsInGroup( "Domain Users")

Dim strUsername As String
Dim objGroup    As Object
Dim objUser     As Object
Dim objNetwork  As Object

UserIsInGroup = False

If Username = "" Then
    Set objNetwork = CreateObject("WScript.Network")
    strUsername = objNetwork.UserDomain & "/" & objNetwork.Username
Else
    strUsername = Username
End If

strUsername = Replace(strUsername, "\", "/")
If InStr(strUsername, "/") Then
    ' No action: Domain has already been supplied in the user name
Else    
    If Domain = "" Then
        Set objNetwork = CreateObject("WScript.Network")
        Domain = objNetwork.UserDomain
    End If        
    strUsername = Domain & "/" & strUsername        
End If

Set objUser = GetObject("WinNT://" & strUsername & ",user")    
If objUser Is Nothing Then    
    ' Insert error-handler here if you want to report an unknown user name
Else
    For Each objGroup In objUser.Groups
        'Debug.Print objGroup.Name
        If GroupName = objGroup.Name Then
            UserIsInGroup = True
            Exit For
        End If
    Next objGroup
End If

Set objNetwork = Nothing
Set objGroup = Nothing
Set objUser = Nothing

End Function

Hopefully this late submission is of use to other developers: when I looked this up for the first time, back in 2003, it was like nobody had ever used AD groups in Excel or MS-Access.

Found this online

Function IsMember(strDomain As String, strGroup _
  As String, strMember As String) As Boolean
  Dim grp As Object
  Dim strPath As String

  strPath = "WinNT://" & strDomain & "/"
  Set grp = GetObject(strPath & strGroup & ",group")
  IsMember = grp.IsMember(strPath & strMember)
End Function

Now, I only need the account name of the current user. Too bad Application.CurrentUser doesn't give me their Domain Account name.