Hi Ivan
Thank you for your patience.
Issue 1:
enable drag and drop of a row from one GridGroupingControl to another GridGroupingControl ?Currently, we are handle the Control.DragOver and Control.DragDrop events to do implement the Drag & Drop functionality In a GridGroupingControl. In a future release, the GridGroupingControl will be extended to directly support OLE Drag & Drop. Please refer the below KB link for more details.
http://www.syncfusion.com/support/kb/grid/Default.aspx?ToDo=view&questId=235Please let me know if you have any other concerns.
Regards,
Vishnu.