Ex24: VBA - GetName of AutoNumber using DAO

Get the name of the AutoNumber field, using DAO.

Option Compare Database
Option Explicit

'Constants for examining how a field is indexed.
Private Const intcIndexNone As Integer = 0
Private Const intcIndexGeneral As Integer = 1
Private Const intcIndexUnique As Integer = 3
Private Const intcIndexPrimary As Integer = 7

Function GetAutoNumDAO(strTable) As String
    'Purpose:   Get the name of the AutoNumber field, using DAO.
    Dim db As DAO.Database
    Dim tdf As DAO.TableDef
    Dim fld As DAO.Field
    
    Set db = CurrentDb()
    Set tdf = db.TableDefs(strTable)
    
    For Each fld In tdf.Fields
        If (fld.Attributes And dbAutoIncrField) <> 0 Then
            GetAutoNumDAO = fld.Name
            Exit For
        End If
    Next
    
    Set fld = Nothing
    Set tdf = Nothing
    Set db = Nothing
End Function