Synopsis:
   ctcp [=]<nick>|<channel> clientinfo [<ctcp command>]

Description:
   This lets you find out what CTCP commands another client knows how
   to deal with.  You can get a more detailed explanation of the CTCP
   commands understood by specifying the desired command.

Examples:
   To get more information on VERSION from Joebob:
      /ctcp joebob clientinfo version

Other Notes:
   Some CTCP commands, DCC, ERRMSG and SED in particular, are not meant
   to be used manually.  The results can be unpredictable.