Extending Microsoft Dynamics 365 for Operations Cookbook

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The form is based on the FormRun class. We can see this by opening (double-click) classDeclaration for the CustGroup form:

public class ConWHSVehicleParameters extends FormRun 

This differs from AX 2012, where the declaration was public class FormRun extends ObjectRun, which was probably a little more honest, as the form is not a type; this is why it can have the same name as a table.

This is actually a definition file that FormRun instantiates with in order to build and execute the form.

Once the system has built the form design using SysSetupFormRun, it will perform the initialization tasks and run the form. The key methods in this are Init and Run. These can be overridden on the form in order to perform additional initialization ...