
barcode -- Print barcode (CODABAR format) of a number (to an Epson FX-80)
           External command, version 1.1 / by Jeff Hansen

syntax:   barcode <string> [-l <integer>] [-d] [-s]

ex:       barcode 39015015200994
          barcode 29015001518518 -d
          barcode 0-671-68402-7 -d -s
          barcode 83-23522 -s
          barcode $36.00 -l30
          barcode '-12.95' -d

Prints a barcode for a character string input.  Enter the number with no
spaces, maximum length of 18 digits.  The barcode is printed in
'double-strike' mode, for uniformity of the vertical bars.  (A fresh ribbon
produces the most readable barcodes.)

Valid barcode characters are: 0123456789-$:/.+

If the first character of your barcode is a dash (-), enclose the string in
quotes--otherwise the parser will assume it is a parameter.

options:

          -l   Left margin offset, from 0 to 38.  Default is six (6).

          -d   Print barcode double size.  For each vertical bar, 2 adjacent
               bars are sent to the printer.  Default is one (1).  

               Double sized barcodes are printed at 120 dpi, single at 90 dpi.

          -s   Use the CODABAR standard start/stop characters (A/T).  Default
               is (A/B).
