Brian Ekins answers this question on Sept 10, I found after a little seach.
So, never mind!
"Nathan Rutman" wrote in message
news:1F3F3CA7AF3F6E1ECEC404934E23FFEA@in.WebX.maYIadrTaRb...
> I need to be able to determine when a user switches the active document.
> I guess this would be something like DocumentEvents.OnActivate event, but
> how do I use this?
>
>