MotionEventNotifySet requests
host notification of the event(s) that are generated by motion
and specified by eventMask, and also specified by
the implementation-specific location pointed to by external
(if external is not NULL).
The event notification information in external is
in addition to the event notification information in eventmask,
i.e, the event notification information in eventmask
and in external is not the same information. Note
that eventmask or external can be NULL
(but not both NULL).
Event notification is enabled for event types specified in eventMask,
a bit mask generated by the bitwise OR of the MPIEventMask bits
associated with the desired MPIEventType values. Event notification
is disabled for event types that are not specified in eventMask.
The mask of event types generated by a Motion object consists of
bits from MPIEventMaskMOTION and MPIEventMaskAXIS.
|