Add this procedures
Public nTime as double
Public Sub ShowTime()
Worksheets("Sheet1").Range("A1").Value = Format(Time, "hh:mm:ss")
nTime = Now + TimeSerial(0, 0, 1)
Application.OnTime nTime, "ShowTime"
End Sub
and run it.
You need to stop it also
Private Sub Workbook_BeforeClose(Cancel As Boolean)
Application.OnTime ntime, "ShowTime", , False
End Sub
'This is workbook event code.
'To input this code, right click on the Excel icon on the worksheet
'(or next to the File menu if you maximise your workbooks),
'select View Code from the menu, and paste the code
--
HTH
Bob Phillips
(replace somewhere in email address with gmail if mailing direct)