Does your question concern RadControls for WinForms or RadControls for ASP.NET?
If you are interested in the WinForms suite, and I am understand you correctly, what you need is Bring Into View
functionality for nodes. This feature will be available in the upcoming SP2 release.
If your question is related to our ASP.NET treeview control, please ask your question in the Treeview for ASP.NET
All the best,
the Telerik team