This function opens a RIFF compound file by name.

#define INCL_MMIOOS2
#include <os2.h>

PSZ          pszFileName;  /*  RIFF file name. */
PMMCFINFO    pmmcfinfo;    /*  Pointer to MMCFINFO. */
PMMIOINFO    pmmioinfo;    /*  Pointer to MMIOINFO. */
ULONG        ulFlags;      /*  Flags. */
HMMCF        hmmcf;        /*  RIFF compound-file handle. */

hmmcf = mmioCFOpen(pszFileName, pmmcfinfo,
          pmmioinfo, ulFlags);