Developing Business Central Apps with AL

Learn how to write any application using the AL programming language on the Dynamics 365 Business Central platform.

Get started

Overview

• Before you start
• Get started with AL
• Learn AL through learning paths and modules

video

• AL hacks and insights

Tutorial

• Build your first extension

Reference

• Frequently asked questions (FAQ)
• AL on StackOverflow
• AL on Discord
• AL on X

Understand building blocks

Overview

• A tour of the AL language
• Inside an AL codeunit

Concept

• Data types
• Tables and data
• Pages and user interfaces
• Reports
• Error handling
• Testing
• Coding style

Tutorial

• Creating a table
• Extending a table
• Creating a page
• Extending a page
• Creating a report
• Extending a report
• Testing an application

Learn key concepts

Overview

• Extending
• Extension lifecycle
• Base and system application reference

Concept

• Data types
• Interfaces
• Objects
• Methods
• Triggers
• Events
• Attributes

Tutorial

• Your first interface
• Introduction to events
• Implementing workflow events

Discover what's new

What's new

• What's new in 2025 release wave 1
• What's new in 2024 release wave 2
• What's new in 2024 release wave 1

Reference

• AL language changelog
• Known issues and bugs
• AL bugs and feature requests

Find other AL language reference

Reference

• Diagnostics
• AL simple statements
• AL control statements

Stay connected

Reference

• GitHub
• YouTube
• Twitter