A pulse ID as generated by IP_PulseNew.
The rcvid field from an IP_MsgInfo structure.
The pointer to a message received through IP_Receive.
0 if the pulse does not correspond to the rcvid and msg, or non-zero if the rcvid and msg do represent the pulse.
This function compares the rcvid and msg to the pulse, and determines whether they really represent an occurrence of the pulse.