Developing Outlook Express add-in /plug-in, Windows Mail add-on:
VB.NET, C#, C++

Add-in Express™
for Outlook® Express and Microsoft® .net


  • Visual Basic .NET 2003, 2005, 2008
  • Visual C# .NET 2003, 2005, 2008
  • Visual C++ .NET 2003, 2005, 2008
  • RemObjects Chrome 1.5


  • Outlook Express 6.x
  • Windows Mail 6.x

Add-in Express for Outlook Express technology is now available for our custom development services only. If you are an existing customer of this tool, please do not worry, we will continue supporting it for you.

Add-in Express for Outlook Expressis the premier RAD tool for programming Microsoft® Outlook Express extensions. It works on Microsoft Visual Studio® .NET 2003, 2005 and 2008 and makes it very comfortable for developing Outlook Express add-ins. Add-in Express completely supports Outlook Express 6.x and the newest Windows Mail on Vista.

Works for Microsoft VB.NET, C#, C++ and RemObjects Chrome

Add-in Express for Outlook Express is developed in C# and directly supports Visual Basic® .NET (VB .NET), Visual C#, and Visual C++® in Visual Studio 2003, 2005 and 2008, as well as RemObjects Chrome. Besides that, Add-in Express works on all commercial editions of Visual Studio, so you can develop feature-rich extensions for Outlook Express on the low-cost Microsoft Visual Studio Standard and Professional editions.

Outlook Express extensibility

Add-in Express provides Outlook Express and Windows Mail with a unified extensibility model, based on interfaces and objects of the Microsoft Office and Outlook, and in this way it offers you an Outlook-like object model and makes your plug-ins managed, isolated, secure and version-neutral. Here is just a short list of what you can do for enhancing the Outlook Express GUI with Add-in Express:

  • Add custom menu items to the main Outlook Express menu and Inspector menus - (1).
  • Create your own toolbars for the main Outlook Express window and mail windows - (2).
  • Use simple, pop-up, dropdown, split buttons and separators on your OE toolbars - (3).
  • Develop regions for the Preview pane - (4).
  • Create view and form regions for the main OE window and mail compose and read windows - (5).
  • Build regions for the Folder List, Contacts pane and Outlook Bar - (6).

Customizing Outlook Express and Windows Mail

Add-in Express for Outlook Express features and benefits

Outlook Express extensibility

Using Add-in Express components and tools you can quickly extend the Outlook Express GUI, customize OE main menu and toolbars as well as menus and toolbars on mail windows. For the Explorer and Inspector windows, Add-in Express allows adding your custom controls such as menu items, buttons, pop-ups, dropdown buttons, split buttons, etc. Learn more...

Unified Outlook Express Objects

Add-in Express reflects the Outlook Object Model to Outlook Express and, in that way, lets you benefit from your Outlook development experience. For the first time, you use Outlook-like objects and events such as Application, Folder, MailItem, Explorer, Inspector, Attachment objects and NewMail, SelectionChange, ItemAdd, FolderSwitch events when accessing Outlook Express. Learn more...

Windows Mail on Vista

You needn't bother about version-related pitfalls of Outlook Express. With Add-in Express you write the code of your OE plug-in once and have it work in Outlook Express 6 on Windows 2000 or XP and Windows Mail on Vista. Learn more...

Isolation experience

A dedicated loader (ADX Loader) isolates each add-in into its own AppDomain. Now you can build strongly typed, managed, easily deployable and secure extensions for Outlook Express that extend its GUI and automate its objects. Learn more...

Efficient project templates

Add-in Express supplies your Outlook Express projects with powerful project templates that contain all necessary functionality for developing Outlook Express plugins and centralize all technology-specific components through visual designers and modules. Learn more...

Advanced view and form regions

On the component market, Add-in Express is the first development tool that can make any your forms parts of Outlook Express views and forms. With advanced view and form regions you can embed your forms into the main Outlook Express window and any e-mail windows. Learn more...

Component-centric programming model

Add-in Express contains a set of components that make your coding productive, and your add-ins feature-rich and effective. Learn more...

Deployment experience

To each Outlook Express solution, Add-in Express adds a special setup project based on the built-in Visual Studio technology. Learn more...

Visual designers

In most cases, you use visual designers and Outlook Express-related components instead of routine coding, say, when customizing Outlook Express menus and toolbars and handling Outlook Express events. Learn more...

True RAD - you write applied code only

Add-in Express is a time-saving tool. It is completely based on the Rapid Application Development (True RAD) paradigm and allows you to significantly accelerate the development and deployment for OE. Learn more...