Hi Michael,
Thanks for your interest in syncfusion products
Q1.Currently, we don't support office2010 incl backstage. However, we would be implementing this feature in our volume4 release.
Q2. The performance of the Ribbon control is affected while loading the Skin. However, we would be working on this and try reducing the loading time in our next release. Thanks for notifying this issue to us.
Q3.We have attached a sample that illustrates how to drag and
drop from the listbox to our TreeViewAdv control.
Please let us know if you have any queries.
Thanks,
Mayavel K
treeviewListboxdragandrpop_48e85590.zip