Hi Chetan,
Thanks for using Syncfusion products.
We have created a simple sample to illustrate the Dockability of Docking windows in DockingManager where you can download under the following location.
Sample Link:
http://www.syncfusion.com/downloads/Support/DirectTrac/91752/F102881_DMDockability-1969250242.zip In this sample, we have set the dockability of element using Dockability attached property in DockingManager. Using this property, we can allow some windows to be in Tabbed position. It would be very helpful to us if you provide more information on your requirement like providing any screenshots so that we could analyze further.
Please let us know if the sample helps.
Regards,
Surya Narayana