We can add display methods to tables and forms using extension classes. The table route is preferred, as tables are reusable. We sometimes need to add display methods to a form because some information is only available when the form is built, such as data on the form's data sources.
This is a limitation in that the display methods on forms cannot be added to the data source object, and they don't currently accept a record as a parameter. For this reason, they can only use the current record of a data source and cannot, therefore, be used as on-grid controls—they would show the same values on all rows.
In our case, we will write a display method to show information from a service order, in order to state that new orders will be attached to the service order. Of course, if this is intended as a warning, it needs...
