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How to Encode ALT Characters in Barcodes

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How do I Encode ALT Characters in barcodes?

01-18-12 12.1 year(s) ago

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Brant	Best Answer There are no assigned ASCII values for modifier commands such as ALT or CTRL. Encoding an ALT or CTRL sequence to be recognized by a scanner is specific to the scanner. Consult your specific scanner documentation for info on what values may be recognized as modifier commands. Many Honeywell scanners use STX (~d002) as the Alt key and ENQ (~d005) as the Crtl key. Some scanners also use ETX (~d003) as the Alt key. This example assumes ETX is the ALT key. Enable ApplyTilde or ProcessTilde and encode an ASCII 003 to emulate pressing the ALT character. For example: 1. In Code 128 Auto and PDF417: ~003 is the ALT; Example to produce Alt+f: ~003f Example to produce multiple Alt characters for Code 128 or PDF417 barcodes: If you wanted to encode an Alt+f and Alt+o, use:~003f~003o 2. In Data Matrix, Aztec, QR Code ~d003 is the ALT; Example to produce Alt+f: ~d003f Example to produce multiple Alt characters for these 2D barcodes: If you wanted to encode an Alt+f and Alt+o, use: ~d003f~d003o 3. In Code 39 $C is the ALT (at the end, use $D) Note: Full ASCII Code-39 must be enabled in the scanner for this to work. Example to produce Alt+f: $Cf$D Example to produce multiple Alt characters for Code 39: If you wanted to encode an Alt+f and Alt+o, use: $Cf$Co$D Note: Encoding ASCII 003 is the decimal character for End of Text (ETX) and your scanner may not interpret this as the Alt key, as keyboard wedges are used to define non-ASCII keys and vary from scanner to scanner (see your scanner manual for more details). Some scanners may perform a shift command (only for the next character) while others may perform a latch or switch. When the command is a latch or switch it will be necessary to switch back unless the command is at the end of the barcode. Posted 12.1 year(s) ago (0) (0) Report Abuse

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