Behind the connection: Microsoft Word or Excel calls a Delphi application

This tutorial shows how you can have a Microsoft Office (Word, Excel,…) call your Delphi application. For the demonstration, I will use Word. From Word, a macro will call my Delphi application which will prompt the user for some data which will be inserted in the Word document.   In the real world, it is likely that your Delphi application will be a large application managing enterprise