The following code illustrates how to add an element.

   HMMCF hmmcf1;
   CHAR *pFileName;
   FOURCC fcctype;
   CHAR *pchBuffer;
   USHORT cchBuffer;
   ULONG ulFlags;
   ULONG rc;
    ...

   strcpy( pFileName, "myelement.foo" );
   fcctype = FOURCC_FOO;
   rc = mmioCFAddElement(hmmcf1,
                         pFileName,
                         fcctype,
                         pchBuffer,
                         cchBuffer,
                         ulFlags);
   if (rc)
     /* error */
   else
    ...