Maybe you could use an event macro.

Right click on the worksheet tab that should have this behavior. Select view
code and paste this into the code window:

Option Explicit
Private Sub Worksheet_Change(ByVal Target As Range)

If Target.Cells.Count 1 Then Exit Sub

If Intersect(Target, Me.Range("a:a")) Is Nothing Then
'do nothing
Else
Target.Speak
End If
End Sub

If you're new to macros, you may want to read David McRitchie's intro at:
http://www.mvps.org/dmcritchie/excel/getstarted.htm

If you want to read more about these kinds of events:

Chip Pearson's site:
http://www.cpearson.com/excel/events.htm

David McRitchie's site:
http://www.mvps.org/dmcritchie/excel/event.htm

ram wrote:

Is there a way to only have this function turn on after entering data in
column A/

Thanks for any help

--

Dave Peterson