Access VBA Rename column in backend database

Sub Add_Column_to_Backend(ByVal oTable As String, ByVal oColumn As String, ByVal oType As String)
    
    Dim strDbName As String 'Database name
    strDbName = GetLinkedDBName(oTable)
    Dim dbs As DAO.Database
    Dim tdf As DAO.TableDef
    Dim fld As DAO.Field
    Dim blnFieldExists As Boolean
    ''Set dbs = CurrentDb()
   
    Set dbs = OpenDatabase(strDbName)
    Set tdf = dbs.TableDefs(oTable)
    
    For Each fld In tdf.Fields
        If fld.Name = oColumn Then
            blnFieldExists = True
            Exit For
        End If
    Next
    
    If Not blnFieldExists Then
        If oType = "Date" Then
           Set fld = tdf.CreateField(oColumn, dbDate)
           fld.DefaultValue = "=Now()"
        ElseIf oType = "Text" Then
            Set fld = tdf.CreateField(oColumn, dbText)
        Else
            Set fld = tdf.CreateField(oColumn, dbText)
        End If
       
        tdf.Fields.Append fld
        MsgBox "New column & '" & oColumn & "' added to table '" & oTable & "'"
    End If
    
End Sub

Public Function GetLinkedDBName(TableName As String)
    Dim db As DAO.Database, Ret
    On Error GoTo DBNameErr
    Set db = CurrentDb()
    Ret = db.TableDefs(TableName).Connect
    GetLinkedDBName = Right(Ret, Len(Ret) - (InStr(1, Ret, "DATABASE=") + 8))
    Exit Function
DBNameErr:
    GetLinkedDBName = 0
End Function