building error messages

In reality this question is about Visual C 6.0 but I couldn't find a more suitable area. When trying to build source code from http://curl.haxx.se/lxr/source/docs/examples/httpput.c, I get the following error messages

C:\Project\libcurl\VisualStudio\MyApplication2\MyApplication.cpp(35) : error C2664: 'fread' : cannot convert parameter 4 from 'void *' to 'struct _iobuf *'
        Conversion from 'void*' to pointer to non-'void' requires an explicit cast
C:\Project\libcurl\VisualStudio\MyApplication2\MyApplication.cpp(60) : error C2065: 'open' : undeclared identifier
C:\Project\libcurl\VisualStudio\MyApplication2\MyApplication.cpp(62) : error C2065: 'close' : undeclared identifier

What is the source of these errors?

Source code follows:

#include "stdafx.h"
#include <stdio.h>
#include <fcntl.h>
#include <sys/stat.h>

#include <curl/curl.h>

/*
 * This example shows a HTTP PUT operation. PUTs a file given as a command
 * line argument to the URL also given on the command line.
 *
 * This example also uses its own read callback.
 *
 * Here's an article on how to setup a PUT handler for Apache:
 * http://www.apacheweek.com/features/put
 */

size_t read_callback(void *ptr, size_t size, size_t nmemb, void *stream)
{
  size_t retcode;

  /* in real-world cases, this would probably get this data differently
     as this fread() stuff is exactly what the library already would do
     by default internally */
  retcode = fread(ptr, size, nmemb, stream);

  fprintf(stderr, "*** We read %d bytes from file\n", retcode);

  return retcode;
}

int main(int argc, char **argv)
{
  CURL *curl;
  CURLcode res;
  FILE * hd_src ;
  int hd ;
  struct stat file_info;

  char *file;
  char *url;

  if(argc < 3)
    return 1;

  file= argv[1];
  url = argv[2];

  /* get the file size of the local file */
  hd = open(file, O_RDONLY) ;
  fstat(hd, &file_info);
  close(hd) ;

  /* get a FILE * of the same file, could also be made with
     fdopen() from the previous descriptor, but hey this is just
     an example! */
  hd_src = fopen(file, "rb");

  /* In windows, this will init the winsock stuff */
  curl_global_init(CURL_GLOBAL_ALL);

  /* get a curl handle */
  curl = curl_easy_init();
  if(curl) {
    /* we want to use our own read function */
    curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);

    /* enable uploading */
    curl_easy_setopt(curl, CURLOPT_UPLOAD, TRUE) ;

    /* HTTP PUT please */
    curl_easy_setopt(curl, CURLOPT_PUT, TRUE);

    /* specify target URL, and note that this URL should include a file
       name, not only a directory */
    curl_easy_setopt(curl,CURLOPT_URL, url);

    /* now specify which file to upload */
    curl_easy_setopt(curl, CURLOPT_READDATA, hd_src);

    /* and give the size of the upload */
    curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, file_info.st_size);

    /* Now run off and do what you've been told! */
    res = curl_easy_perform(curl);

    /* always cleanup */
    curl_easy_cleanup(curl);
  }
  fclose(hd_src); /* close the local file */

  curl_global_cleanup();
  return 0;
}


Thanks!