Hi Michael Storchmann,
Excuse me for the misunderstanding.
We have investigated why the WPF demo header cells can be dragged and it seems that we have missed to exclude GridViewHeaderCell
element from the DragAndDrop implementation. This should be done on each DragAndDrop event - OnDragInfo, OnDropInfo, OnDragQuery, OnDropQuery:
You can check the corresponding Silverlight demo for a reference.
the Telerik team
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