Command C - add an archive comment
This command allows to add a comment to an archive. The maximum comment length is 62000 bytes for RAR archives and 32768 bytes for ZIP archives. It is also possible to add an archive comment through archive management command Add archive comment.
Because archive volume modification is disabled, this command is not applicable to volumes. You may use switch -z<file> to add a comment to a volume when creating it.
WinRAR c distrib.rar
WinRAR c -zinfo.txt dummy