Thanks Ed - that worked a treat.
If you're ever in my neck of the woods, the beers are on me.

BTW - you don't fancy doing an article for VFUG on this when the (excellent) WSH series is finished do you.... :)
There is a heck of a lot of power in this object but with so many switches and combinations it's a bit of a minefield trying to figure out what works and what doesn't.

Thanks again
AJ