Ok.
isquery is just another method of determining window type.
It works in a similar manner as to ischan (excepting that ischan returns if #chan is a channel you are on).
isquery would work in a similar manner, excepting to be a quicker method to return $window(something).type
I am currently using $query(blah) instead of $window(blah).type
However, it shouldn't exactly matter if you use $query(blah) or blah is query.
And as has been mentioned, the isquery/isdcc should be slightly faster.
Anyway, these
are just
suggestions.