Visual toolkit to develop secure and isolated, version-neutral and feature-rich, deployable and updatable COM add-ins, smart tags, RTD servers and user-defined functions for Microsoft Office 20007 - 2000. Create application-specific plugins and shared extensions that work on all end-user applications: Outlook, Excel, Word, PowerPoint, Visio, Project, MapPoint, Publisher, etc. Supports VB.NET, C#, C++, J#. More info: http://www.add-in-express.com
Free download