
Chapter 15. Function Reference
373
Syntax:
MARK$
Description:
MARK$ returns a 3-byte string which consists of the first one byte representing a bar
code type and the remaining two bytes indicating the number of digits of the bar
code.
• The first one byte of a returned value contains one of the following letters repre-
senting bar code types:
• The remaining two bytes of a returned value indicate the number of digits of the
bar code in decimal notation.
•
MARK$ returns a null string until bar code reading takes place first after start of
the program.
code MARK I/O function
MARK$
Returns a bar code type and the number of digits of the bar code.
Bar code type First one byte of a returned value
EAN-13 or UPC-A A
EAN-8 B
UPC-E C
ITF (Interleaved 2 of 5) I
STF (Standard 2 of 5) H
Codabar (NW-7) N
Code 39 M
Code 93 L
Code 128 K
EAN-128 W
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