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API, class, and table resources



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This article describes where to find API documentation in Visual Studio and Microsoft Learn.

Application classes and tables

Application class and table documentation is in Visual Studio

You can find documentation for the application classes in Microsoft Visual Studio. Search for the class name in Application Explorer and then display the code. You can find additional metadata about the class in the Properties window. You can download a list of all the tables in the Technical Reference Reports. For more information, see Find information about standard data entities.

Programming with application tables and classes

Application tables are similar to application classes, but they have the following differences:

Tables are persistent.

Table fields are always public.

A table almost always corresponds to a real object.

You must sometimes erase the definition of a table if you want to extend it with another table.

Design pattern of private new in application classes

All application classes are under Application Explorer > Classes. Every application class has the constructor method named new, even if the class has no new node in the Application Explorer. If the class has no explicit new node, the implicit new method is public. A design pattern that's sometimes used in the application classes is to declare the explicit new constructor method as private. Then you add a public static method to call the new method. The static method can restrict or control the call to the new method based on various conditions, if necessary.

System classes and tables

System API, class, and table documentation in Microsoft Learn

You can find documentation for the classes and functions listed under System Documentation in Application Explorer in Microsoft Learn documentation.

X++ compile-time functions

X++ compile-time functions

X++ run-time functions

X++ run-time functions:

X++ container run-time functions

X++ business run-time functions

X++ conversion run-time functions

X++ date run-time functions

X++ math run-time functions

X++ reflection run-time functions

X++ session run-time functions

X++ string run-time functions

System tables

System tables

System classes

The reference documentation for the system classes is in the .NET API browser.

API reference for finance and operations apps

Microsoft.Dynamics.Ax.Xpp namespace

Dynamics.AX.Application namespace









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Last updated on 2026-04-01







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