* return 1 to explicitly allow the join to go ahead or 0 to ignore the event.
* @param user The user joining the channel
* @param chan The channel being joined
- * @return 1 to explicitly allow the join, 0 to proceed as normal
+ * @return 1 to explicitly allow the join, 0 to proceed as normal. Return -1 to explicitly deny the
+ * join to the channel.
*/
virtual int OnCheckBan(User* user, Channel* chan);