showit.rex:     See "Purpose", below
Copyright (C) 2015 Leslie L. Koehler
This is free software. See "Notice:" at the bottom of 
 C:\MyRexxStuff\showit.rex
 
 Author: Les Koehler vmrexx@tampabay.rr.com
 
Purpose: Display the data items passed. Items can be a stem, a file 
         (or a piece of one), a literal string or the definition of 
         a variable that will be used for substituting its occurrences 
         in lines from stems, literal strings, and/or files. For example:
              '&varname=txt' or '&varname='value
         As many items as needed can be used.
         A string that starts with ':' triggers Options processing.
         Valid options to change the defaults are: 
           NOShow  - Don't display the output file
           Quiet   - Skip the Exit message when NOSHOW is used
           NOTepad - Allow testers to use NotePad
         Any number of Options lines can be used and any option can be
         negated by starting it with 'NO' (or not) as needed.
 
 Syntax: Call showit .context~name , [output fileid] , item [, item ...]

The output fileid defaults to the caller appended with '_help.txt'

Example: Call showit 'C:\MyRexxStuff\test.rex' , -- Caller 
           , 'C:\Reports\Symposium.txt' ,        -- Output fle (optional)
           , 'Financial Data Report' ,           -- Literal string
           , stema. , stemb. ,                   -- Stems
           , '1 5 C:\Sigs\Lesk.txt' ,            -- Lines 1-5 of a file   
           , '1 * C:\temp\junk.txt' ,            -- The whole file
           , '7 eof C:\temp\test.txt' ,          -- Line 7 to end-of-file
           , ':quiet noshow' ,                   -- Options
           , '&lcme='lcme                        -- Variable definition

   Help: showit [? | /? | -? | Help | /Help | -Help | --Help]

Here's a real example, in the file C:\MyRexxStuff\showit.rex:
HELP:
  xmpstart=thisline()-1
  xmpend=thisline()+9
  more=''
  if symbol('ARGS')='VAR' then more=':'args /* Allow options */
  outvar=beghelp endhelp fullme /* startline endline & file to extract from */
  Call Showit fullme ,, outvar ,              /* Caller , data to show  */
   ,more ,       /* Allow options to be tested from a command window */
   ,"&lcsme="lcsme , '&sme='sme , '&this file.='fullme , /* Substitutions */
   ,"&helps="helps , '&fullme='fullme , xmpstart xmpend fullme
-- Note that the above 2 lines are NOT substituted when SHOWIT displays them.
-- That's because of the double-quote before the first '&'.