ezBarcode Label Printing Software - Code 128 specification for ezBarcode

Code 128, also known as ANSI/AIM 128, USS Code 128 is a continuous, multilevel, full ASCII code.

Encoding
Code 128 There are three types of code 128 encoding. Type A provides the character set of all upper case alphanumeric characters plus all of the ASCII control characters. Type B provides the character set of all upper and lower case alphanumeric characters. Type C provides increased density for numeric encoding with double density numeric characters for all number pairs from 00 to 99.

Check Sum
Code 128 symbology must include a checksum digit. The steps for calculating the check digit are as follows: Add the start character value(103, 104, or 105) to the running checksum. Take each character in the message, take its value, and multiply it by its character position, and add the total to the running checksum. The checksum digit is the result of running checksum modulo 103.

Use Caret (^)
The UseCaret propeties is set to true by default which is only apply to Code128, UccEan128, Sscc18, Scc14, PDF417, MacroPDF417, QR Code, and DataMatrix etc. where full ASCII is accepted as encoding. The 3 digits data following the caret will be treated as ASCII code, e.g. ^010 is \\n.
For Code 128, UccEan128, if the FNC1 (ASCII 202) is used, human readable parentheses can be added to the CodeData manually by using the following ASCII code

^222 = (XX)
^223 = (XXX)
^224 = (XXXX)
^225 = (XXXXX)
^226 = (XXXXXX)
^227 = (XXXXXXX)

The ^222, ^223, ^224, ^225, ^226, ^227 will be transfer to FNC1 (ASCII 202) in the barcode, however, the parantheses will be added to human readable text by the digits. For example, to encode (01)2345678, the data of ^222012345678 would be used.

Code 128 Character Set

Code A	Code B	Code C	ASCII	Char	Value	Code A	Code B	Code C	ASCII	Char	Value
Space	Space	00	0032		00	V	V	54	0086	V	54
!	!	01	0033	!	01	W	W	55	0087	W	55
"	"	02	0034	"	02	X	X	56	0088	X	56
#	#	03	0035	#	03	Y	Y	57	0089	Y	57
$	$	04	0036	$	04	Z	Z	58	0090	Z	58
%	%	05	0037	%	05	[	[	59	0091	[	59
&	&	06	0038	&	06	\	\	60	0092	\	60
'	'	07	0039	'	07	]	]	61	0093	]	61
(	(	08	0040	(	08	^	^	62	0094	^	62
)	)	09	0041	)	09	_	_	63	0095	_	63
*	*	10	0042	*	10	nul	`	64	0096	`	64
+	+	11	0043	+	11	soh	a	65	0097	a	65
,	,	12	0044	,	12	stx	b	66	0098	b	66
-	-	13	0045	-	13	etx	c	67	0099	c	67
.	.	14	0046	.	14	eot	d	68	0100	d	68
/	/	15	0047	/	15	eno	e	69	0101	e	69
0	0	16	0048	0	16	ack	f	70	0102	f	70
1	1	17	0049	1	17	bel	g	71	0103	g	71
2	2	18	0050	2	18	bs	h	72	0104	h	72
3	3	19	0051	3	19	ht	i	73	0105	i	73
4	4	20	0052	4	20	lf	j	74	0106	j	74
5	5	21	0053	5	21	vt	k	75	0107	k	75
6	6	22	0054	6	22	ff	l	76	0108	l	76
7	7	23	0055	7	23	cr	m	77	0109	m	77
8	8	24	0056	8	24	s0	n	78	0110	n	78
9	9	25	0057	9	25	s1	o	79	0111	o	79
:	:	26	0058	:	26	dle	p	80	0112	p	80
;	;	27	0059	;	27	dc1	q	81	0113	q	81
<	<	28	0060	<	28	dc2	r	82	0114	r	82
=	=	29	0061	=	29	dc3	s	83	0115	s	83
>	>	30	0062	>	30	dc4	t	84	0116	t	84
?	?	31	0063	?	31	nak	u	85	0117	u	85
@	@	32	0064	@	32	syn	v	86	0118	v	86
A	A	33	0065	A	33	etb	w	87	0119	w	87
B	B	34	0066	B	34	can	x	88	0120	x	88
C	C	35	0067	C	35	em	y	89	0121	y	89
D	D	36	0068	D	36	sub	z	90	0122	z	90
E	E	37	0069	E	37	esc	{	91	0123	{	91
F	F	38	0070	F	38	fs	\|	92	0124	\|	92
G	G	39	0071	G	39	gs	}	93	0125	}	93
H	H	40	0072	H	40	rs	~	94	0126	~	94
I	I	41	0073	I	41	us	del	95	0195	Ã	95
J	J	42	0074	J	42	fnc 3	fnc 3	96	0196	Ä	96
K	K	43	0075	K	43	fnc 2	fnc2	97	0197	Å	97
L	L	44	0076	L	44	Shift	Shift	98	0198	Æ	98
M	M	45	0077	M	45	code C	code C	99	0199	Ç	99
N	N	46	0078	N	46	code B	fnc 4	code B	0200	È	100
O	O	47	0079	O	47	fnc 4	code A	code A	0201	É	101
P	P	48	0080	P	48	fnc 1	fnc 1	fnc 1	0202	Ê	102
Q	Q	49	0081	Q	49	Start A	Start A	Start A	0203	Ë	103
R	R	50	0082	R	50	Start B	Start B	Start B	0204	Ì	104
S	S	51	0083	S	51	Start C	Start C	Start C	0205	Í	105
T	T	52	0084	T	52	Stop	Stop	Stop	0206	Î
U	U	53	0085	U	53

ezBarcode will automatically swich between encoding code set if the AUTO is set for the encoding method.

Code 128 Specification