Add-in Express for Microsoft Office and .net

Easily write professional extensions for Microsoft Office such as COM add-ins, smart tags, real-time data servers and user-defined functions.

Published by Add-in Express
Distributed by ComponentSource since 2006

Prices from: US$ 387.10 Version: 10.4.4741 NEW Updated: Mar 11, 2026 3.50 Star Average Review3.50 Star Average Review3.50 Star Average Review3.50 Star Average Review3.50 Star Average Review (3)

Screenshot of Add-in Express for Microsoft Office and .net

Add-in Express for Microsoft Office and .net Releases

Released: Mar 11, 2026

Updates in 10.4.4741

Features

  • Added support for Visual Studio 2026.

Released: Aug 25, 2025

Updates in 10.3.4730

Features

  • Added support for Microsoft Office 2024 applications.
  • Added new members to 'ADXExcelError' and 'ADXxlCVError' enumerations.
  • Added 'OnBeforeClickTwiceWebRequest' event to the 'ADXAddinModule' and 'ADXXLLModule' classes.

Fixes

  • Add-in Express Outlook panes in DockLeft, DockTop, DockRight, and DockBottom regions caused add-ins to crash on Arm64.
  • Exception "temp.exe.manifest could not be found" when signing ClickOnce installer using adxpublisher.exe from command line.
  • The ADXDesignClasses...
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Released: Aug 8, 2023

Updates in 10.2.4714

Features

  • Added support for signing Add-in Express project output with Extended Validation (EV) code signing certificate.
  • Enhanced look and feel for 'Advanced Task Panes' and 'Advanced Outlook Regions' in the most recent versions of Microsoft Office applications.

Fixes

  • ADXAddinModule.OnSendMessage event might not have been raised in some scenarios.
  • Property editor of the SuperTip property did not support multi-line text.
  • SuperTips were not shown on Ribbon controls in some scenarios.
  • Signing...
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Released: Mar 24, 2022

Updates in 10.1.4703

Fixes

  • Installation failed if Visual Studio 2022 was installed.
  • Dock-based Advanced Outlook Regions may have an incorrect size after switching to another scale in Display settings.
  • ADXServiceCTP invisible pane was shown mistakenly in some scenarios.
  • Backspace key didn't work with Chinese language.

Released: Nov 22, 2021

Updates in 10.0.4700

Features

  • Added support for Microsoft Office 2021 applications.
  • Added support for Microsoft Visual Studio 2022.
  • Added a system constant to the OfficeColorScheme enumeration.
  • Added BeforeStoreRemove and StoreAdd events to the ADXOutlookAppEvents component.
  • Visual Studio 2010 is no longer supported.
  • Microsoft .NET Framework 2.0 and 3.x are no longer supported.
  • ADXExcelRef.SetValue method is now obsolete.

Fixes

  • Several issues with tray notifications during ClickTwice updates.
  • Silent...
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Released: Jan 29, 2021

Updates in 9.5.4661

Features

  • Added UnmanagedHooks property to the ADXAddinModule class.

Fixes

  • SendMessage method of the ADXAddinModule class might throw an exception in some scenarios.
  • In Visual Studio 2019, a newly created ADX RTD Add-in project contained an incorrect value in the ToolsVersion attribute.
  • adxloader.dll and adxloader64.dll files might not be timestamped in a certain scenario.
  • Add-in Express projects conflicted with settings of .editorconfig files.
  • Some values of the ADXKeyboardShortcut.ShortcutText...
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Released: May 23, 2019

Updates in 9.3.4640

Features

  • Support for Visual Studio 2019.
  • Additional error handling in ClickTwice deployment.

Fixes

  • PropertyChanging event was raised instead of the ItemPropertyChanging event.
  • ClickTwice installation published in Visual Studio 2017 failed because of the missing MSVCP100D.dll library.
  • Visual Studio 2017 might have hung after closing an XLL module designer.
  • "COM object that has been separated from its underlying RCW cannot be used" exception in a COM add-in module after turning an XLL module off...
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Released: Nov 20, 2018

Updates in 9.2.4635

Features

  • Added support for Office 2019 applications.

Fixes

  • ADXRibbonButton Size property located in the ADXRibbonSplitButton or ADXRibbonMenu components might have been changed at design-time.
  • XLLModule ExcelApp property returned null when enabling editing in the Protected View window.
  • RTD Server slowdown in Excel 2013 and higher.
  • Outlook 2016 with an embedded Advanced Outlook Form region might crash after calling Inspector.Activate method.
  • FolderView region Header disappeared after switching...
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Released: Jun 21, 2018

Updates in 9.1.4620

Features

  • Added DpiChanged event to the ADXTaskPane class.
  • Added Create and Delete methods to the ADXTaskPane class.
  • Added ADXBeforeDrag event to the ADXExcelTaskPane, ADXWordTaskPane, ADXPowerPointTaskPane and ADXOlForm classes.

Fixes

  • XLL add-ins crashed Microsoft Excel.
  • "Could not load file or assembly EnvDTE" exception when installing Add-in Express for Visual Studio 2017 only.
  • False positive reports for Add-in Express’s binaries by some antivirus software.
  • Create Setup Project wizard threw an...
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Released: May 3, 2018

Updates in 9.0.4610

Features

  • Support for mixed-mode DPI scaling in Office 2016 applications.
  • Support for the asynchronous loading and initialization of the Add-in Express package in Visual Studio 2017.