Installing the Help Model › The Role of the TIRHELP Exit

The Role of the TIRHELP Exit

TIRHELP is a runtime exit, which is written in COBOL, containing code for the flow to the application Help business system. The same sample exit is included in z/OS Runtime DLLs, each used by the specific target environment, such as TSO, CICS, or IMS.

TIRHELP includes sample code as comments. Until you modify TIRHELP, it displays the message:

No help available.

After you remove the comment characters and execute the TIRHELP sample code, TIRHELP performs the following steps:

Follow these steps:

1. TIRHELP checks the flags and determines the procedure in the application help business system it flow to, that is the field description, screen description, or permitted values.
2. TIRHELP calls TIRMSG, which performs the transfer to the target procedure.
3. When the help procedures complete and it enters the exit, TIRHELP executes a SET NEXTTRAN TO CONCAT(TRIM(input tirhelp trancode) to return to the calling application.