Modules & VBA :: Call Event From Subform Using Tag Property?

I am starting to explore VBA and Modules. I recently found a relativly simple way to add an Audit Log to a database without adding two tables for each table as outlined by Allen Browne.

I used a set of code from fontstuff.com and it works great, except when using a sub form. I belive that it is most likely because the use of the Tag property looks at the subform as a control but it holds no value. I am thinking the VBA needs to be altered or the BeforeUpdate command need to specify what form to look in.

The Before Update code is

Code:

Public Sub Form_BeforeUpdate(Cancel As Integer)

Code:
If Me.NewRecord Then
Call AuditChanges("SubForm_ID", "NEW")
Else
Call AuditChanges("SubForm_ID", "EDIT")
End If
End Sub

AuditChanges is the Module Event name and CustomerID is the unique identifer for a Subform.