I am trying to use the worksheet_selectionchange event and it doesn't seem to
be doing anything. I would like to call a sub routine when the user clicks on
cell "a18"

I am trying just to see if I can get the event to trigger and no matter what
I do nothing happens

right now I tried this:

Private Sub Worksheet_SelectionChange(ByVal Target As Range)

If Target.Address = "A18" Then
MsgBox "hello"
End If

End Sub

This is in the worksheet that I want it to run for

Do I have to turn on anything for this event to work?
Am I missing something?

Thanks