How to create an Outlook add-in in Delphi without using third party components?

Question

How to write an Outlook add-in in Delphi without depending on any third party components. Looking for compatibility with MS Office from 2003 and all newer releases.

I see similar questions in SO but the response will always suggest to use some third-party component.

Answer 1

To develop a Outlook Addin or interface other applications with Outlook, you need to use the Outlook Object Model.

• Outlook Object Model Reference - Office 2003
• Outlook Object Model Reference - Office 2007
• Outlook Object Model Reference - Office 2013

Answer 2

Here is a (sample) project I found which creates an add-in to outlook. This will help to understand the technology.

http://www.dimastr.com/babelfish/

Tested with Outlook 2003 and Delphi 2007

You have to register the DLL using regsvr32.exe