c0073d04_PI_inside__Skype_chat_commands__Description
[Option] JOINING_ENABLED [Description] 
When this bit is off, new users cannot join the chat. This option has to be enabled before the options JOINERS_BECOME_APPLICANTS and JOINERS_BECOME_LISTENERS can be set. Also, this cannot be disabled while one of the JOINERS_BECOME_xxx options is still set.
BPI inside: Skype chat commands
Description