You can perform most forms control procedures through 4GL. However, if you must use a form control that is not supported in 4GL, call an EQUEL procedure that displays a form. The table File Extensions in the previous section shows the languages for which EQUEL is provided.

If the EQUEL procedure uses a form which is not used by any user-specified frame, it must initialize the form with ###FORMINIT or ###ADDFORM. A compiled form that is not used by any user-specified frame must be specified in ING_ABFOPT1. For more information regarding this name, see Building Applications.

The EQUEL procedure must use an EQUEL/Forms statement to display the form. The EQUEL code in EQUEL procedures cannot use ##INGRES, ##FORMS, ##EXIT, or ##ENDFORMS statements. For details, see the QUEL companion guide.