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OS/2 Shareware BBS: 18 REXX
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README
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Setup instructions:
For this tutorial, we are going to be creating a series of REXX programs
that we will run during the tutorial and we will also be using a program
called rexxtry.cmd to interactively execute some REXX logic. To get maximum
benefit, I suggest the following preparation:
1) create a directory for the .CMD files that came with the tutorial.
You should have the following files in this directory:
hello.cmd
rexxdir.cmd
arg.cmd
sizeused.cmd
2) Open an OS/2 windowed command prompt and make the directory you created
in step 1) the current directory. I will be asking you to issue some
commands and run the REXX programs in this window.
3) Open a second OS/2 windowed command prompt and issue the command
"rexxtry" at the prompt. This be bring up an interative REXX program
environment. The interactive environment allows you to directly type in
REXX instructions and have them executed. We will be switching between
the two windows to run some complete REXX programs and enter instructions
in REXXTRY. I will refer to these as the "prompt" and "rexxtry" as I
go along. If I tell you to enter something at the prompt, I want you to
enter a command at the OS/2 command prompt. If I tell you to type
something into rexxtry, I mean at the rexxtry prompt.
General Logistics
I will be working from a prepared script, leading you through some common
REXX concepts that require you to run some short .CMD files or try out some
REXX code in rexxtry. I will be sending out the information from my end
using cut-and-paste from a master script, but I will be doing everything
I instruct you to do myself so that I give everybody sufficient time to
do the stuff I tell you.
I have several breaks scheduled to take questions about things just covered,
as well as opportunity at the end for additional questions.
Additional Information
The REXX reference information is available in online form in the OS/2
Information folder. There is also a hardcopy version of this available as
The OS/2 REXX/2 Reference Manual, IBM order number S10G-6268. We also have
a seperate User's Guide available, a text book approach to teaching REXX.
This is an excellent manual for learning how to program in REXX. It is
targetted for relatively inexperienced users, but is useful for very
experienced ones also.