Adds a mutex semaphore or an event semaphore to a muxwait-semaphore list.
#define INCL_DOSSEMAPHORES #include <os2.h> HMUX hmux; /* The handle of the muxwait semaphore that is to receive the additional semaphore. */ PSEMRECORD pSemRec; /* A pointer to the semaphore record that is to be added to the muxwait list. */ APIRET ulrc; /* Return Code. */ ulrc = DosAddMuxWaitSem(hmux, pSemRec);