Thank you for your question.
In order to add UserControls in RadDock, you should follow the API provided in this article
As to the titlebar area of the ToolWindows, you can add elements to the CaptionElement of ToolTabStrip:
sender, DockWindowEventArgs e)
e.DockWindow.Text = String.Empty;
RadLabelElement radLabelElement =
ToolTabStrip toolTabStrip = e.DockWindow.DockTabStrip
I hope it helps. Please write back if you have additional questions.
the Telerik team
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