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If you want to post HDevelop code to your Wordpress site, I recommend using Crayon Syntax Highlighter. It can be customized to display the HDevelop/HALCON programming language quiet correctly.
When everything worked as expected, the file layout should be the following:
| |-- langs | | |-- halcon | | | |-- README.md | | | |-- control.txt | | | |-- halcon.txt | | | |-- operator.txt | | | `-- reserved.txt | |-- themes | | |-- hdevelop | | | `-- hdevelop.css