VJVictory Jessie Selvam D Syncfusion Team December 17, 2014 08:33 AM UTC
Thank you for contacting Syncfusion support.
We have used the DragDropHelper class for our internal use in our DockingManager to reposition the DocumentTabItem by drag and drop. We cannot use this class to drag and drop like toolbar drag-drop in form designers.
Please let us know if you need further assistance on this.