Show how to implement a custom ComboBoxEdit with TreeView as a PopupContent and use it inside DXGrid as a custom column. We've modified this code example by using the DevExpress control version 13.1.

I want to create a combination of treeview/listview that would behave like this: have a few roots (such as: Effects/Transitions/Text Effects). Each will expand to a few effect packs. An effect pack ...