Nevermind :) I created a class called ExpandableList<T> that inherits from List<T> AND implements ICustomTypeDescriptor. This is a pretty useful technique, I'll post it as an article soon. -Matt Bart: Look at me, I'm a grad student. I'm 30 years old and I made $600 last year. Marge: Bart, don't make fun of grad students. They've just made a terrible life choice. -- modified at 22:27 Wednesday 12th July, 2006