%PROGRAMFILES%\Common Files :Question

in some of my apps their is needed data stored in the
"%PROGRAMFILES%\Common Files"

Could some one please explain how the "Common Files" folder
is handled in an app!
i don't understand.

1. is [DirectoriesMove] used from the data folder ?
2. or is it put in the "App" folder and linked with some script in the ini.

this is something i am now up against and would like to learn
thank you for your answers.