|Triggered when a PRIVMSG or NOTICE has been received from a remote user and a query
for that user doesn't exist yet. KVIrc has already checked its internal conditions
and you have the last word on the query creation. If you call halt in this event
you will prevent the creation of the query window, in all other cases the window
will be created. This is useful for filtering out spam messages that popup unwanted
windows in front of the user. You have also the option of creating the query window
yourself (by calling query). This may be useful if you want to create
the query windows in a particular state (minimized, positioned in some special place
or maybe undocked if some conditions are verified).
The next event you will catch related to this query window will be
onquerywindowcreated and onquerytargetadded.
After that you will get onquerymessage with exactly
the parameters passed to this event.