Added in 1.9.0
For DCC Chat windows, the <matchtext> parameter is excluded, and it triggers only on successful connection.
Trigger for various events relating to the opening of a window of different types of windows.
See also on CLOSE.
Haltable using ^
<level> - 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.
; Print a message when a query window is opened. on *:OPEN:?:*:echo -ag Opened query window for $nick