>A refresh option would be nice, wouldn't it? Unfortunately, there isn't one ... you have to go into the ToolBox and Add/Remove Items just as if you were adding them for the first time, find your DLL and re-add them.

Yes, but before, we have to remove all of the classes. Otherwise, we'll end up with some doubles.

I see however that the setting is preserved from project to project. So, it is a good thing that we only have to set it once.