If your Refering to the speech agent here is some info
Agents
mIRC supports Microsoft Agent if you have it installed on your system. An agent is an animated character that can speak text and perform actions.
Note: The agent dialog will only be visible if agent is already installed on your system. If it isn't installed, you can find links to related websites and resources, as well as download information, on the mIRC website at
http://www.mirc.co.uk/agents.html