See how to create an add-in for Excel 2013 – 2003 using C# or VB.NET. Learn more about special features for Excel developers:
The video shows how to build a custom Excel ribbon, make a custom command bar, add a custom ribbon and command bar, create custom task panes, add a custom keyboard combination, respond to Excel events and more. Excel 2013, 2010, 2007 and lower and Visual Studio 2012 – 2005 are supported.
More videos and how-to samples: