Combobox & Datasource

[marc_lecuyer]

I have to create a derived combobox (Windows form) that add automatically an item when it's
bound to a datasource (dataset)

ex. : Item A from dataset
Item B from dataset
<Add an item...> (item added manually)

and I have to send an event when this item is selected. I don't know if it's
possible (I don't have a lot of experience deriving controls) but if it is, if someone
could put me on the right track, I would appreciate.

Thanks

Marc