[2005] Developer Express - RepositoryItems

If anyone has any experience with DevExpress and their GridControl you may be of some help to me -

In DevX, to give a GridControl controls such as drop-downs, calendars, look-ups, check boxes, etc. one needs to add an item called a RepositoryItem - These RepositoryItems are bases for the actual controls Such as a LookUpEdit, DateEdit, CheckEdit -

The GridControl has a collection of these RepositoryItems that can be added to the Grid and used - the problem is that the RepositoryItemLookUpEdit's Properties are stripped from the LookUpEdit's properties and do not give the full functionality -

I can't Cast a RepositoryItem as its regular control, and am not sure how I can use inheritance to give it these added capabilities -

Any help on the subject would be great.
- Thanks