xmlSaveCtxtPtr ctxt;

   int fd;
   fd = open ((char*)"c:\\temp\\test.xml", O_RDWR | O_CREAT);
   ctxt = xmlSaveToFd (fd, "UTF-8", 1);
  // ctxt = xmlSaveToFilename ((char *)"c:\\temp\\test.xml", "UTF-8", XML_SAVE_FORMAT);
   long ll;
   
   ll = xmlSaveDoc (ctxt, doc);
   xmlSaveClose(ctxt);
  // close (fd);
   
   /*free the document */
   xmlFreeDoc(doc);