LAPRdCancel
LAPRdCancel Cancel a LAPRead call
#include <AppleTalk.h> AppleTalk Manager
OSErr LAPRdCancel( abRecord);
ATLAPRecHandle abRecord; handle to an ATLAPRec
returns Error Code; 0=no error
LAPRdCancel is part of the AppleTalk alternate interface. See LAPRead for
information on the correct method for reading ALAP frames using the
preferred interface.
LAPRdCancel cancels a LAPRead call.
abRecord is a handle to an ATLAPRec structure
Returns: an operating system Error Code. It will be one of:
noErr (0) No error
recNotFndErr (-3108) ABRecord not found in queue
readQErr (-3105) Invalid protocol type or protocol type not found in
table.

Notes: Given the handle to the ATLAPRec of a previously made LAPRead call,
LAPRdCancel de queues the LAPRead call, provided that a packet
satisfying the LAPRead has not already arrived. LAPRdCancel returns
noErr if the the LAPRead call is successfully removed from the queue. If
LAPRdCancel returns recNotFnd, check the abResult field to verify that
the LAPRead has been completed and determine its outcome.