These examples go with the blog post at
https://www.pyxll.com/blog/a-better-goal-seek/
In order to have them work correctly you should add the
path of the configuration file in this directory to the value of
the external_config setting in your main configuration file's
[PYXLL] section.
The three different macro implementations will then be available as Ctrl+Alt+P, Ctrl+Alt+Q and Ctrl+Alt+R.