How to write an add-in for SharePoint Designer 2010

Question

I am looking for information about writing an add-in for SharePoint Designer 2010. If you go to File-> options, there is the option to add COM add-ins, I would like to write it, preferably using C #.

Any pointers to documentation / examples? What specific SharePoint classes are available?

Answer 1

There is information that may be useful in this forum: http://social.technet.microsoft.com/Forums/en/sharepoint2010customization/thread/be3c20bf-f842-46ae-8cf1-a2dd81a6c4dc

I have not tried this myself, though.

Answer 2

http://vsto.codeplex.com/releases/view/17375 - .

http://www.deque.com/products/deque-labs/sharepoint-designer-2010-add-in - , .