[AccessD] Counting Co IDs

I know there's a simple way to do it, but I can't recall -- will have to 
review some old tips.

Susan H.


>I think that that will just "count" the CoIDs, I want to know how many
> different ones are represented.
> One of the issues is I won't know before hand how many to allot for....
>
> I may not be doing a good job of defining this either....