Could you please be more specific in your question. I am not sure that I fully understand what do you mean by '"integration". Please take look a the TreeView >> Manipulate data >> Editing example in our demo application and try to change some of the color values. This example demonstrates how to use a drop down list editor in RadTreeView.
If this is not what you are looking for, please describe your scenario in greater detail.
I hope it helps.
Greetings,
Jack
the Telerik team
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