Add-in Express for Microsoft Office and .net
If you're developing Office add-ins, you're simply crazy to do so without Add-in Express.
Joe Zuffoletto, President, SmartCompany
Version Neutrality

You write a single code base to support all Office versions.
Visual Designers

You use visual designers instead of routine coding.
Outlook Features

Advanced functionality for your Outlook plug-in development.
Easy Deployment

Maximum flexibility for your installations and the ability to install extension updates with a single click.
Reviews
I've been an avid user of Add-in Express for Microsoft Office and .NET for years and couldn't be happier. I first used the tool to build an Outlook add-in for a large bank in the USA. The Add-in Express toolset solved all the major risks in the project: support for multiple versions of Microsoft Outlook, non-admin installation, and working with the Outlook Security Guard. Add-in Express handled all of this plus made many other tasks super easy thanks to their visual designers.
Add-in Express dramatically simplifies the process of creating and deploying Office add-ins. For instance, when creating an add-in, you can specify which versions of Office you want to support, beginning with an "Office neutral" option that supports all versions beginning with Office 2000. You can also, when starting your project, specify which Office components you want to support - Add-in Express automatically generates the necessary support code. In addition to general support for Office, Add-in Express offers support for some specific Office technologies. You can use Add-in Express to simplify the process of extending the Outlook shortcut bar, creating Smart Tags or creating Excel Real Time Data components. You'll still have to learn how to manipulate the object models for the various Office components, but Add-in Express makes integrating your code into Office almost trivial. II can no longer imagine doing Office development in the .NET Framework without this tool.
Latest News
Add-in Express for Microsoft Office and .net 9.5.4661
Adds UnmanagedHooks property to the ADXAddinModule class.Add-in Express for Microsoft Office and .net 9.3.4640
Adds support for Visual Studio 2019.Add-in Express for Microsoft Office and .net 9.2.4635
Adds support for Microsoft Office 2019 applications.About Add-in Express
Add-in Express Ltd. has a history of leadership in the Microsoft Office integration industry being the pioneer of tools and solutions based on Microsoft Office. It has been working on the development tools and components market since 1998. Its components and tools are distributed and used worldwide by tens of thousands of developers including the most Fortune 500 companies who integrate and embed their applied code into all applications from the Microsoft Office Suite. It works on three platforms (Microsoft .NET, Microsoft VSTO 2005, and Borland VCL) supports all available MS Office applications, versions and suites, and targets its products to help developers save time and money with elegant commercial class solutions.