Everything that is in mirc can either be found in help, or in the complete versions text (
http://www.mirc.co.uk/versions.txt ). if its not in those, then its undocumented, and that usually means that its either been replaced by another identifier, or included for backwards compatibilty.
To answer your question, you must name each property individually. You can't "loop" through each property, you must know its property directly.