In a sheet module enter:

Private Sub Worksheet_Change(ByVal Target As Excel.Range)
If Intersect(Target, Range("A1:C1")) Is Nothing Then Exit Sub
Application.EnableEvents = False
Range("A1:C1").Value = Target.Value
Application.EnableEvents = True
End Sub

--
HTH

Sandy
In Perth, the ancient capital of Scotland
and the crowning place of kings


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"Eric" wrote in message
...
Does anyone have any suggestions on how to do this trick in excel?

Within the cell A1, B1, C1, when I enter a number in one of three cell,
such
as 3 in cell A1, then 3 will be automatically display on cell B1 and C1.
On
the next step, if I enter 6 in cell B1, then 6 will be automatically
display
on cell A1 and C1. On the next step, if I enter 8 in cell C1, then 8 will
be
automatically display on cell A1 and B1.
Does anyone have any suggestions on how to do this trick in excel?
Thanks in advance for any suggestions
Eric