Loop thru controls in form - what's wrong?

[salvelinus]

This is an Access 97 db. I want to loop through the controls in the detail section of a form only, and have the code below. Access throws an Application or Object defined error at the indicated spot. If I highlight "ctl", Access gives the value that's in the textbox which is the first control, e.g. the date. I'm basically trying to make sure the user has entered at least some data in the detail area of the form before it's saved. Thanks.

Private Function CheckForData() As Boolean
    Dim ctl As Control
    Dim i As Integer
    
    For Each ctl In Me.Controls   <--- highlighting ctl = value in that control
        [COLOR=Red][B]i = Forms![Survey Review].ctl.Section   [/B] [/COLOR] <--- error here
        If i = acDetail Then
        If TypeOf ctl Is CheckBox Then
            If ctl.Value = True Then
                CheckForData = True
                Exit Function
            End If
        ElseIf TypeOf ctl Is TextBox Then
            If Len(ctl.Text) > 0 Then
                CheckForData = True
                Exit Function
            End If
        End If
        End If
    Next
End Function