Develop Office add-in in Delphi

Creating Office COM add-in, Outlook plugin, Excel XLL addin in Delphi

Add-in Express for Office and Delphi VCL is the powerful platform for creating any types of Microsoft Office customizations with minimal coding. It supports all versions of Microsoft Office from 2000 through 2019 and all main applications including Outlook, Word, Excel, PowerPoint, Visio, Access, etc. With Add-in Express can easily create professional extensions such as:

  • Office COM Add-ins
  • Outlook plug-ins
  • Excl RTD servers
  • Excel Automation add-ins
  • Smart tags
Three custom forms embedded into an Outlook Explorer window

The best platform for Microsoft Office development

Delphi produces Win32 code that makes your plug-ins compact, fast and easily deployable, while Add-in Express offers you a powerful tool for Microsoft Office customization. In this way, you get a perfect platform for developing world-class extensions for Microsoft Office.

Microsoft Office developers will certainly appreciate the following features of Add-in Express that no other development tool provides.

Version-neutral extensions for Office 2019 - 2000

Project templates to create Office COM add-ins, Excel Automation add-ins, RTD servers and smart tags

You can take advantage of the Add-in Express version-neutral core and create all types of Microsoft Office customizations, including:

  • Office COM Add-ins
  • Outlook plug-ins
  • Automation add-ins
  • RTD servers
  • Smart tags

Your extensions will work perfectly in all Office versions, from 2000 through Office 2019 32-bit and 64-bit. You can choose to support all Office versions with a single code base or specify the minimum version for your plug-in.

Visual designers instead of routine coding

Visual designer of the Office Ribbon tab

Add-in Express provides a set of visual designers, special components and project templates, which make Office add-in development fast and easy. You use visual designers instead of error-prone coding to customize Microsoft Office menus, toolbars, ribbon tabs, Outlook regions, custom Office task panes, forms, windows, etc.

In other words, Add-in Express takes care of the plumbing code letting you focus on building your solutions!

Outlook plugin development

Replace any Outlook view with your .net form

With Add-in Express you get new really unique features for your Microsoft Outlook plug-ins:

  • Advanced Outlook view and form regions to embed your Delphi forms into Outlook windows, Outlook bar, To-Do bar, Reading pane and Navigation pane.
  • Ribbon components to extend the Outlook 2010 - 2019 Explorer windows and Outlook 2007 - 2019 Inspector windows with your own ribbon tabs, groups, buttons and other controls.
  • Special Outlook Explorer and Inspector toolbar components to customize the main Outlook 2007 - 2000 windows and all forms such as Outlook mail forms, contact and task forms in Outlook 2000 - 2003.
  • Outlook-specific context-sensitivity properties to bind your custom toolbars and ribbons to certain Outlook windows, folders or context.

More about special features for customizing Outlook UI.

Excel add-ins, UDF, RTD

Advanced custom task pane in Excel 2013

If Excel is your targeted application, you can leverage fully featured solutions that Add-in Express offers for all Excel extensions:

  • You can use the Advanced Office Task Panes to create an amazing UI of your Excel add-ins and extend document views with your own .net forms.
  • You can build Excel RTD servers with any number of RTD topics and use them on any Excel worksheets. Your real-time data can be used in Excel formulas, charts and pivot-tables.
  • You can develop new worksheets functions (user-defined functions) aka Excel Automation Add-ins for Excel 2002 - 2019.

More about creating Excel extensions.

Find more details

Add-in Express helped in my development for the Vancouver 2010 Olympic Games

The project was a success and delivered on time and within budget due in no small part to the ease of use and stability of the Add-in Express components. Doug Filteau, President and Principal Consultant, Little Mountain Systems Inc.

It's one of the best Delphi component investments we've ever made

Add-in Express components make developing with Outlook and the rest of the Office Suite just about as easy as it could be. Richard Stevens, BOE Information Systems Ltd.

Add-in Express is the backbone of my micro-ISV

Add-in Express is the ONLY solution on the market that enables Delphi programmers to take advantage of the productivity advantages offered by Delphi to develop full COM add-ins for Office. Manuel Onate, Founder and owner, MomSoft

Add-in Express has proven to be worth its weight in platinum

Using your excellent software, I have written an add-in that presents the user with a simple toolbar within what is now a template Excel spreadsheet. I could not have done this without Add-in Express, and it has proven to be worth its weight in platinum! James Gilliver, Sinapsis Systems Limited

Add-in Express is not the holy grail, but is as close to it as a programming suite can be

Creating the structure of a new Outlook add-in using Add-in Express takes only a few minutes. After that we do not have to worry about ActiveX any more, we only have to use the simple and well documented classes and tools of Add-in Express. Stefan Dorhofer, CEO, Priotecs IT GmbH

Add-in Express for Office and Delphi is number one VCL component set

I asked my friend about some solution to my problem and he advised me to take a look at Add-in-Express components. That was amazing! It took me only couple of hours to understand how components work and by the end of the day the task has been solved! Wu An, Student, Nanjing University of Science and Technology

Supported Delphi versions:

  • Delphi XE2 Architect, Ultimate, Enterprise, Professional with Update Pack 4 Hotfix 1
  • Delphi XE3 Architect, Ultimate, Enterprise, Professional with Update Pack 2
  • Delphi XE4 Architect, Ultimate, Enterprise, Professional with Update Pack 1
  • Delphi XE5 Architect, Ultimate, Enterprise, Professional with Update Pack 2
  • Delphi XE6 Architect, Ultimate, Enterprise, Professional with Update Pack 1
  • Delphi XE7 Architect, Ultimate, Enterprise, Professional
  • Delphi XE8 Architect, Ultimate, Enterprise, Professional
  • Delphi 10 Seattle Architect, Ultimate, Enterprise, Professional
  • Delphi 10.1 Berlin Architect, Ultimate, Enterprise, Professional
  • Delphi 10.2 Tokyo Architect, Enterprise, Professional

Supported applications:

  • Excel 2000 - 2019
  • Outlook 2000 - 2019
  • Word 2000 - 2019
  • PowerPoint 2000 - 2019
  • Access 2000 - 2019
  • Project 2000 - 2019
  • Publisher 2003 - 2019
  • Visio 2002 - 2019
  • OneNote 2010 - 2016
  • InfoPath 2007 - 2013
  • FrontPage 2000 - 2003
  • MapPoint 2002 - 2013

How to buy this product

Add-in Express Ltd.

Add-in Express for Office and .NET as well as all other development components available on are products of Add-in Express Ltd.

To purchase the product, please click the order link below. This will take you to Add-in Express's order page where you can review the subscriptions and prices and choose the one that is right for you:

Buy Add-in Express for Office and Delphi VCL

Embarcadero Technology Partner

Embarcadero Technology Partner

Add-in Express Ltd. is a privately held software development company located in Homel, Belarus. Established in 1998, Add-in Express Ltd. focuses on tools and solutions purposed for Microsoft Office integration. It has been a Microsoft Visual Studio Industry Partner and Embarcadero Technology Partner for the last few years.

Contact us

Our working hours: 0am to 10am PST; 3am to 1pm EST; 8am to 6pm CET.

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