Add-in Express for Office and .NET is your all-in-one framework to develop commercial class extensions for all main applications and all versions of the Microsoft Office suite, from 2000 to 2021. With the range of visual designers, components and Visual Studio project templates you can quickly create various Microsoft Office customizations including COM Add-ins, Outlook plug-ins, Excel XLLs, UDFs and RTD Servers from prototype to final release, all with a single code base. All main applications of the Office suite are supported, including Outlook, Word, Excel, Visio, Access, PowerPoint, MapPoint, FrontPage, InfoPath, Project and Publisher.