It is a true RAD tool for creating COM Add-ins, Smart Tags and RTD on .NET. Add-in Express supports all host applications from MS Office Family such as Outlook, Excel, Word, PowerPoint, Access, Visio, FrontPage, Project, MapPoint and Publisher.

Add-in Express .NET is developed in C# and directly supports C#, Visual Basic .NET (VB.NET), J#, C++ and Delphi for .NET. It implements everything required by the supported technologies including IDTExtensibility2, IRTDServer, ISmartTag and ISmartTagTopic(2), and you are to write the functional code only.

With a couple of clicks Add-in Express .NET allows you to:
- Create command bars and their controls, handle their events and handle events of the add-in host applications (for COM Add-ins).
- Specify any smart tag topics and their recognizers including dynamical recognizers.
- Develop effective RTD Servers including passing parameters to any RTD functions.

Add-in Express .NET supports Visual Studio 2003 and 2005, Delphi 8 and 2005, .NET Framework 1.0 and higher.