`plSetUsage`: Set the strings used in usage and syntax messages.
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#### `plSetUsage`: Set the strings used in usage and syntax messages.

`plSetUsage (` | program_string,
| usage_string`)`;

Sets the program string and usage string displayed by the command line help option (-h) and by `plOptUsage`.

`program_string` (`const char *`, input)

  String to appear as the name of program.

`usage_string` (`const char *`, input)

  String to appear as the usage text.

This function is currently available in C, C++, Java, Ocaml, Octave and Python.

This function is not used in any examples.

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