This function selects the best master stream to be used in a synchronized group. It allows a super group to be created that may contain other synchronized groups.
#include <os2.h>
PHSTREAM    phstreamMaster;  /*  Handle address. */
PMASTER     paMasterList;    /*  Stream handle array address. */
ULONG       ulNumMasters;    /*  Number of streams in master list. */
ULONG       rc;              /*  Return code. */
rc = SpiDetermineSyncMaster(phstreamMaster,
       paMasterList, ulNumMasters);