The following code illustrates how to modify the initialization file for MMIO services.

   MMINIFILEINFO mmIniFileInfo;
   ULONG ulFlags = 0L;
   ULONG rc;
    ...

   memset( &mmIniFileInfo, '\0' sizeof(MMINIFILEINFO) );
   mmIniFileInfo.fccIOProc = FOURCC_MYPROC;
   strncpy( mmIniFileInfo.szDLLName, "MYPROC", DLLNAME_SIZE );
   strncpy( mmIniFileInfo.szProcName, "MyIOProc", PROCNAME_SIZE );
   ulFlags |= MMIO_INSTALLPROC;

   rc = mmioIniFileHandler( &mmIniFileInfo,
                            ulFlags);
   if (rc)
     /* error */
   else
    ...