Form designer: .NET user control: How to manage the mapping?

The form designer doesn’t support .Net User control tools when you click on the “Mapping” tab.

But you can directly use the corresponding action parameters to define IN, OUT and INOUT parameters to update or retrieve values from your controls.
You can also use FORM_FIELDS_REQUIRED, FORM_FIELDS_READONLY and FORM_FIELDS_HIDDEN parameters to manage the controls behaviours.

In the following example some parameters have been defined for the user control “ACTION1_MUC11”.
You can download this example from this article.