Provide warning when chartacer count reaches 250 count

I'm trying to provide an audible and message box alert when the user reach a character count of 250 characters in a text box with 255 characters max.

Here is my code but is not working:

Private Sub txtUpdate_Change()

Dim lngNumberOfCharacters As Integer
Dim Update As String
lngNumberOfCharacters = Len(Me.txtUpdate)

    If lngNumberOfCharacters = 250 Then
    DoCmd.Beep
        MsgBox "You have typed 250 characters and the limit is 255 characters."
    End If

End Sub

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SteveL13Asked:
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als315Commented:
Steve!
If you had chance to view answers to your question Q_28533720, you should not ask this question.
Try
lngNumberOfCharacters = Len(Me.txtUpdate.Text)
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SteveL13Author Commented:
Thanks.  That worked.
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