Controls

Type: String

Default:        “ÅÆÇÈÉÊËÌÍÎÏД

Encoding schemes based on Code 128 may include control characters, such as fnc1. These may be inserted by the user into barcode data and are handled in specific ways during the encoding process. (Each character may be created on a western keyboard by holding down the Alt key and type 0xyz on the numeric keypad, where xyz is one of the three digit codes listed below. The table also shows the function initiated by each character while in each of the Code 128 modes.)

 

xyz	character	Code A	Code B	Code C
197	Å	DEL
198	Æ	func. 3	func. 3
199	Ç	func. 2	func. 2
200	È	shift	shift
201	É	code C	code C
202	Ê	code B	func. 4	code B
203	Ë	func. 4	code A	code A
204	Ì	func. 1	func. 1	func. 1
205	Í	Start A	Start A	Start A
206	Î	Start B	Start B	Start B
207	Ï	Start C	Start C	Start C
208	Ð	NUL

 

The Controls property is a string containing the 12 allowed control codes. The programmer has the option to change any or all of these characters for alternative characters by setting the Control property to another string of 12 characters.

The facility to specify control codes is particularly useful for schemes such as GS1-128 where the func 1 character is essential for terminating variable length AIs.

 

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