Convert CUI to PDF

The .cui files from AutoCAD (customization files) doesn't appear to be viable for a PDF conversion, which means this type of cui to pdf conversion is unlikely. Except for that, we unfortunately do not know any other way how to convert cui to pdf or what it should represent.

Simply put, it is impossible to convert CUI to PDF directly.
Thus, there is no so-called cui to pdf converter or a free online .cui to .pdf converter to be found.