What are Control Add-ins in Business Central?

Control Add-ins in Microsoft Dynamics 365 Business Central allow developers to extend the user interface by embedding custom web-based controls built using technologies such as JavaScript, HTML, and CSS. They are particularly useful when standard Business Central pages cannot provide the required interactive experience.

A Control Add-in typically communicates between the Business Central AL environment and the client-side control through defined events and procedures. This makes it possible to introduce custom visualizations, interactive dashboards, maps, charts, barcode interfaces, and other specialized UI experiences.

From an architecture perspective, developers should avoid using Control Add-ins simply because they can. They should be introduced when standard Business Central capabilities, page extensions, or existing controls cannot meet the requirement. Proper consideration should also be given to performance, security, responsiveness, maintainability, and upgrade compatibility.

For Business Central developers, understanding Control Add-ins is valuable when moving from basic AL development toward enterprise-level UI extensibility and solution architecture.