Colin,
That's the good thing about container classes as well, they can have their backcolor set to provide a visual cue while in the designer. I also dropped a label into the lowest level class so that the subclasses could be named. That's another drawback to Custom, that once you have more than one of them in something you can't tell one from the other.
>If, on the other hand, you have separated out business LOGIC from business DATA, and you like having the business logic classes dropped on forms, then it is quite nice to use the Label class as your base bizlogic class. Just make .Visible=.F., and set the text of the label to the name of the Business logic, eg, in the Init of your base BizLogic class: