For more information how to create panes dynamically you can refer to this help article: http://www.telerik.com/help/silverlight/raddocking-managing-docking-controls-dynamically.html
Hope this information is helpful. Please let us know if you have any other questions.
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items