As far as I understand you will need to detect drag-and-drop between tabs within the same DocumentTabStrip instance. The drag-and-drop of tab items in RadDock passes through two states:
1. While mouse is within the area where tabs reside, the DragDropService is not started but rather the default drag-drop logic, inherited from the RadTabStripElement is used.
2. When the mouse leaves tabs area the DragDropService is started and the associated with the tab item DockWindow is passed as drag context.
Could you please prepare a sample project that demonstrates the desired behavior of your application so that I can further help you?
Thank you for your time and cooperation.
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