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Barcode Xpress 9 for .Net - User Guide > Concepts > Barcode Specifications > Barcode Types > QRcode

Glossary Item Box

QR code is one of very few barcode types that allow encoding of Kanji and Kana.


Error Correction Level

This barcode type uses a Reed-Solomon error detection and correction scheme. There are four levels of error correction, each with increasing amount of error recover.

The higher the error level, the less data that can be stored in the barcode.

If using the 1D/2D Standard or 1D/2D Professional editions, 2D writes are supported for QR Code using an external application. Typically, this can be done using the ImagXpress control or by writing to a Printer Device Context. The external application will set the barcode writing parameters and make a call to the Create method. The output image will then be available in the image properties.

Included features to use for this functionality are:

When using trial (unpaid) licensing, the words " UNLICENSED " will appear in the middle of every QR Code, DataMatrix, and PDF417 barcode created, taking up 25 bytes of space. When testing the contents of generated barcodes, be aware of the extra space requirements.


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