C-h a coding-system

In a message dated 1/9/2003 10:39:37 AM Eastern Standard Time, yadin@pitt.edu writes:

I tried the command M-x list-coding-systems in Xemacs for windows, (21.4.11,
cygwin flavor) and it does not seem to exist. Nor does C-h C work to
describe coding systems. how do I check for coding systems and current
coding in Xemacs? It works in standard emacs for cygwin.