Add-in Express is a tool for creating Microsoft Office COM add-ins on Delphi. You can develop a single add-in that will run across the entire Office suite of applications - MS Excel, Word, PowerPoint, Outlook, Access, FrontPage and MS Project.

Add-in Express hides complexity of implementing the IDTExtensibility2 interface that COM add-in architecture is based on. Using Add-in Express, add-in projects can be created by a couple of clicks. You create your own toolbars and place buttons, edit boxes, combo boxes, and pop-ups onto them. It correctly handles hiding and deleting controls, as well as moving them to other toolbars. It also allows handling the controls' events. Use Delphi forms, standard controls and components to develop a COM add-in.