- The [[User Access Level]] for the event to trigger.
<?|@|=|!|*> - The [[Matchtarget]] to listen to.
<matchtext> - The [[Matchtext]] to listen to.
<commands< - The commands to be performed when the event listener's criteria is met.
*Example*
; Print a message when a query window is opened.
on *:OPEN:?:*:echo -ag Opened query window for $nick