Introduction

The rationale for the original SHARE presentation was that while REXX is a versatile language, a High Level Language (HLL) can help do more, such as:

Handle registers and SVCs
Add functions and functional packages
Pre-load EXECs
Replace or extend some native REXX functionality such as I/O

The argument was presented that with LE Applications it is possible to bind LE conforming or LE enabled High Level Assembler Programs.

REXX can invoke both LE and non-LE compliant programs including High Level Assembler ones.

Introductory explanation

The SHARE presentation alluded to on the previous page is only a guide to what is possible. The PDF irself does not contain complete code examples, unlike within these pages.

Main topics discussed

A discussion on the methods of invoking external routines from within REXX
- CALL (both REXX and TSO/E), LINK, LINKPGM and LINKMVS
REXX to LE via pre-initialisation

Topics not yet discussed in detail

LE to REXX by initialising a REXX environment
Options in Compiled REXX

The requisite IBM documentation is:

z/OS TSO/E REXX Reference Manual - for the syntax of the language
z/OS TSO/E REXX User's Guide Manual - for information on how to perform various tasks
z/OS TSO/E Command Reference - for information on TSO/E CALL
z/OS Language Environment Programming Guide - for CEEPIPI examples