With the current Q2 release we introduced the RadDocking.ActivePane, RadPane.IsActive properties and the RadDocking.ActivePaneChanged event. If you want to get the current active pane for the RadDocking control, I would suggest using the RadDocking.ActivePane property. Anyway, if you want to get all the panes for the RadDocking control, you could use the RadDocking.Panes property.
Hope this helps.
the Telerik team
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