Access VBA sub with form as parameter doesn't alter the form

I have a Microsoft Access 2003 file with various tables of data. Each table also has a duplicate of it, with the name '[original table name]_working'. Depend开发者_如何学JAVAing on the user's choices in the switchboard, the form the user choose to view must switch its recordsource table to the working table. I refactored the relevant code to do such a thing into the following function today:

Public Sub SetFormToWorking(ByRef frm As Form)
    With frm
        .RecordSource = rst![Argument] & "_working"
        .Requery

        Dim itm As Variant
        For Each itm In .Controls
            If TypeOf itm Is subForm Then
                With Item
                    Dim childFields As Variant, masterFields As Variant

                    childFields = .LinkChildFields
                    masterFields = .LinkMasterFields
                    .Form.RecordSource = .Form.RecordSource & "_working"
                    .LinkChildFields = childFields
                   .LinkMasterFields = masterFields
                   .Form.Requery
               End With
            End If
        Next
    End With
End Sub

The lines of code that call the function look like this:

SetFormToWorking Forms(rst![Argument])

and

SetFormToWorking Forms(cmbTblList)

For some reason, the above function doesn't change the recordsource for the form. I added the 'ByRef' keyword to the parameter just to be certain that it was passing by reference, but no dice. Hopefully someone here can tell me what I've done wrong?

Try removing the parenthesis from your function calls.

SetFormToWorking Forms(rst![Argument])

SetFormToWorking Forms(cmbTblList)

more information

I found the problem. The variable on the third line

rst![Argument]

doesn't exist in the function's scope. I replaced it with

.RecordSource

Unfortunately I'm having another problem with the code but it's unrelated to this question.