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Code 39 Extended
Anna Vekhina

Code 39 Extended

Using Code 39's "Full ASCII Mode", it is possible to encode all 128 ASCII characters. This is accomplished by using the ($), (/), (%), and (+) symbols as "shift" characters. These characters combined with the single character that follows indicate which Full ASCII character is to be used.

Add the Barcode to a Report

  1. Drag the Barcode item from the report controls toolbox tab and drop it onto the report.

  2. Set the control’s Symbology property to Code39Extended.

  3. Specify common barcode properties and properties specific to Code 39 Extended.

Specific Properties

In the property grid, expand the Symbology list and specify the following properties specific to Code 39 Extended:

  • Calculate a Checksum

    Specifies whether to calculate a checksum for the barcode.

  • Wide Narrow Ratio

    Specifies the density of a barcode's bars.

The Code 39 Extended barcode, as opposed to Code 39, automatically replaces all necessary characters with special symbols, when required. This means that you do not need to do this manually, otherwise, the result will be incorrect.

For example, if you want to insert a "TAB" character into a barcode's text, use "\t", which will be replaced by "$I" for coding, and then into "TAB" after scanning:

Property Value
Barcode's text: "12345\t678"
Coded text: "12345$I678"
Scanned text: "12345[TAB]678"

The checksum is not considered to be part of a barcode's text and checksum characters are never replaced. When the barcode's Show Text and Calculate a Checksum properties are enabled, the barcode will not display a checksum character. This is required to avoid mistakenly treating a checksum as part of barcode text.