On logon

The on LOGON event triggers before and after mIRC sends the standard PASS, NICK, and USER messages to the server.

on <level>:LOGON:*:<commands>

Note that you can use ^ to execute commands just before mIRC sends the standard messages.

Example

on ^*:LOGON:*: {
 echo -a Logging on to $network $server
}

This triggers before mIRC sends the standard messages and echos it to the active window.

on *:LOGON:*: {
 echo -a Logged on to $network $server
}

This triggers right after mIRC sends the standard messages and echos it to the active window.

You can use this to open a debug window right before you connect.

on ^*:logon:*:{
 ; echo with timestamp and corrent window to the status window
 !echo -sct info * Connected to $serverip ( $+ $port $+ )
 ; open a new window called @debug<cid here> and write /.!quote to it
 !window -nvE @debug $+ $cid /.!quote
 ; Outputs raw server messages, both incoming and outgoing, to @debug window.
 !.debug -ntp @debug $+ $cid
}