Something like this

Private Sub Worksheet_Calculate()
Dim cell As Range

On Error GoTo ws_exit:
Application.EnableEvents = False
For Each cell In Columns("C:C")
If cell.value 0 Then
MsgBox "done"
End If
End If

ws_exit:
Application.EnableEvents = True
End Sub

'This is worksheet event code, which means that it needs to be
'placed in the appropriate worksheet code module, not a standard
'code module. To do this, right-click on the sheet tab, select
'the View Code option from the menu, and paste the code in.


--

HTH

RP
(remove nothere from the email address if mailing direct)


"jimbo" wrote in message
ups.com...
I'm stumped. Anyone know how I might trigger a sound alarm
when a cell reaches a certain time?

I have estimated times in one column. The next column I have actual
time. The third column I have column 2 minus column 1. I would
also like excel to trigger an alarm sound if the cell in column 3
is greater than "0". (in other words if the estimated times are
exceeded)

Is this possible?