{IDENTIFICATION} {IS} control-id
{ID            } {= }
  1. Use control-id to assign a unique identifier to a control. This identifier is used any time that control must communicate with your program. It is returned with any messages from the control. You can examine the ID to distinguish which control sent the message. This can be more convenient than using the control's handle because you can assign a fixed identifier that is the same in every run of the program.
  2. If control-id is omitted, then it will be treated as if it were zero (0), unless the control is defined in the Screen Section. In this case it will be assigned the same value as the control's field number (see Screen Description Entry, General Rules for Format 2, for a description of how Screen Section field numbers are assigned). Control IDs must be in the range of 0 to 32767.