I am using the following code obtained from http://support.microsoft.com/kb/197592 to create an audit trail. I would like to have the audit trail field that is created not print the statement "previous value was blank." for new records. The form I want to attach this module to has over 30 fields which would create a lot of pointless verbiage in this field. I think it should be obvious for a new record that all the fields were previously blank. All I would want to print in the audit trail is the "new record" portion. Can anybody help me with tweaking this code to accomplish this? Thanks!
Code:
Function AuditTrail()
On Error GoTo Err_Handler
Dim MyForm As Form, C As Control, xName As String
Set MyForm = Screen.ActiveForm
'Set date and current user if form has been updated.
MyForm!Updates = MyForm!Updates & Chr(13) & Chr(10) & _
"Changes made on " & Date & " by " & CurrentUser() & ";"
'If new record, record it in audit trail and exit sub.
If MyForm.NewRecord = True Then
MyForm!Updates = MyForm!Updates & Chr(13) & Chr(10) & _
"New Record """
End If
'Check each data entry control for change and record
'old value of Control.
For Each C In MyForm.Controls
'Only check data entry type controls.
Select Case C.ControlType
Case acTextBox, acComboBox, acListBox, acOptionGroup
' Skip Updates field.
If C.Name <> "Updates" Then
' If control was previously Null, record "previous
' value was blank."
If IsNull(C.OldValue) Or C.OldValue = "" Then
MyForm!Updates = MyForm!Updates & Chr(13) & _
Chr(10) & C.Name & "--previous value was blank"
' If control had previous value, record previous value.
ElseIf IIF(IsNull(C.Value),"",C.Value) <> C.OldValue Then
MyForm!Updates = MyForm!Updates & Chr(13) & Chr(10) & _
C.Name & "==previous value was " & C.OldValue
End If
End If
End Select
Next C
TryNextC:
Exit Function
Err_Handler:
If Err.Number <> 64535 Then
MsgBox "Error #: " & Err.Number & vbCrLf & "Description: " & Err.Description
End If
Resume TryNextC
End Function