It is a visual RAD tool for building COM Add-ins, Smart Tags and RTD servers in Delphi 5,6,7,2005 and 2006. It implements everything required by the supported technologies such as IDTExtensibility2,ISmartTag and ISmartTagTopic, you write functional code only. Add-in Express supports Outlook, Excel, Word, PowerPoint, Access, Visio, FrontPage, Project, MapPoint and Publisher. Read more on http://www.add-in-express.com/add-in-delphi/