The generic function general-handle-event
"handles" the event-object. What this actually means depends on the type of the object.
There are system defined methods for these classes:
Apply the car
to the cdr
.
Call it.
If fbound call it, otherwise do nothing.
Do nothing.
You can add methods for your own classes.
general-handle-event
is used by all functions that process events, for example wait-processing-events and process-all-events, as well as by internal waiting functions.
LispWorks User Guide and Reference Manual - 20 Sep 2017