Hi Ray,
It is possible to make the window scroll during drag and drop operations by setting TreeViewAdv's AutoScrolling property to ScrollBars.Vertical or ScrollBars.Both
this.treeViewAdv1.AutoScrolling = ScrollBars.Vertical
Please have a look at the attached sample and let me know if you need any further assistance.
Thanks for your interest in Syncfusion products
Best Regards,
Golda
CS49.zip