Coding TSO/VTAM exit routines

Exit routines provide the following functions needed in TSO/VTAM:

Input and output editing that replaces or supplements IBM-supplied editing
Attention handling that replaces IBM-supplied attention handling
Support for terminals not supported by TSO/VTAM
Verifying whether a terminal is capable of receiving a TSO/VTAM user message in the language selected by the TSO user

For information about coding TSO/VTAM exit routines, see z/OS Communications Server: SNA Customization.