On Microsoft Windows, if the application is an automation server the checking routine set up by the delivery keyword
:quit-when-no-windows
now checks the server (as well as CAPI windows). It does not quit if the server appears to be in use.
See
com:automation-server-top-loop
and
com:set-automation-server-exit-delay
for more information.
LispWorks Release Notes and Installation Guide - 23 Dec 2011