The following code illustrates how to obtain information about formats supported by currently installed I/O procedures.

   MMFORMATINFO mmformatinfo;
   LONG   lNumFormats;
   PCHAR  pFormatInfoList;
   LONG   lFormatsRead;
   PCHAR  pFormatInfoList;
   ULONG  ulReserved = 0L;
   ULONG  ulFlags = 0L;
   ULONG  rc;
    ...

   memset( &mmformatinfo, '\0', sizeof(MMFORMATINFO) );
   mmformatInfo.ulMediaType |= MMIO_MEDIATYPE_AUDIO;
   lNumFormats = 3;

   rc = mmioGetFormats( &mmformatinfo,
                        lNumFormats,
                        pFormatInfoList,
                        &lFormatsRead,
                        ulReserved,
                        ulFlags);
   if (rc)
     /* error */
   else
    ...