I am working on an Excel add-in which displays table of data. As part of the
application functionality I would like users to be able to re-organize the
table layout using drag and drop. I have seen this functionality in other
add-in applications but am no sure how to get started. The Excel event model
does not seem to have any obvious events/handlers for drag and drop.

In an ideal world I would like to be able to drag within a workbook and also
from a .Net window (this is a VSTO application) into the worsheet.

Any advice would be greatly appreciated.