>I'm not sure if this answers your question, but my understanding of DisplayClass (and DisplayClassLibrary) is that it's used at design time to determine which control to place on a form when a field is dragged onto the form.

Thanks, Andrew. It's intriguing, don't you think, that it is a propert for DBSETPROP(). This is a complete wild goose chase. For some reason I got curious as to how it might be useful.