SortedFields ASC/DESC

[maio]

Hello,

I'm using the property SortedFields of ZTable and want to use it also for a descending sort. I already read that the property can do that, but I can't find a way to tell it, what to do.
There are always errormessages about the non-existent fields DESC when I try to define sortedfields:='ID DESC' or 'DESC ID' ... [where ID, of course, is my field for sorting]
Who can help ?

Mario