Hi Jeff,
Sorry for the inconvenience caused.
After consulting with the developer,it is confirmed that there is no specific event for this behavior in treeViewAdv control.It can be done by checking in TreeViewAdv DragDrop event.That is by comparing the Source node parent with the destination nodes parent node in DragDrop event to ensure the parent change while drag drop.
I have attached the modified sample.It tells you clearly that ,while dragdrop if previous Source Node''s parent is not same as the Destination Node''s parent,then the parentchange is shown in MessageBox.
Please take a look at it and let me know if this helps you.
Thanks for your continued interest in Syncfusion Products.
Regards,
Deepa.T.S
CS12.zip