Access 2000 automaticly add text to a form entry field

I have an Access 2000 database with a custom form. People are entering info into this. On one of the fields I want to automatically a开发者_StackOverflowppend a ".zip" to one of the fields.

How?

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Assuming you have a textBox called txtFileName, then you can use its AfterUpdate event to do this:

Private Sub txtFileName_AfterUpdate()
    If Not IsNull(txtFileName) Then
        txtFileName = Trim$(txtFileName)
        If Not Right$(txtFileName, 4) = ".zip" Then
            txtFileName = txtFileName & ".zip"
        End If
    End If
End Sub