Whenever you specify an event to occur with a given dialog element, the dialog editor generates code containing the Natural system variables *CONTROL, *DIALOG-ID and *EVENT.

During the processing, *CONTROL contains the dialog element's handle, *EVENT contains the event name and *DIALOG-ID identifies an instance of a dialog.

You can reference these system variables whenever you enter Natural code within the dialog editor. If, for example, the end user clicks on a push button control and the event handler calls a shared subroutine, you can use these system variables as logical condition criteria to trigger the subroutine.

For further details on these system variables, see the System Variables documentation.