added read callback function in order to prevent crashs on Win32 when linked against DLL:

#define REMOTE_URL      "ftp://localhost/"  UPLOAD_FILE_AS

#define RENAME_FILE_TO  "renamed-and-fine.txt"

/* NOTE: if you want this example to work on Windows with libcurl as a

   DLL, you MUST also provide a read callback with

   CURLOPT_READFUNCTION. Failing to do so will give you a crash since a

   DLL may not use the variable's memory when passed in to it from an app

   like this. */

static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *stream)

{

  /* 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 */

  size_t 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;

    headerlist = curl_slist_append(headerlist, buf_1);

    headerlist = curl_slist_append(headerlist, buf_2);

    /* we want to use our own read function */

    curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);

    /* enable uploading */

    curl_easy_setopt(curl, CURLOPT_UPLOAD, 1) ;

    /* now specify which file to upload */

    curl_easy_setopt(curl, CURLOPT_READDATA, hd_src);

    /* NOTE: if you want this example to work on Windows with libcurl as a

       DLL, you MUST also provide a read callback with

       CURLOPT_READFUNCTION. Failing to do so will give you a crash since a

       DLL may not use the variable's memory when passed in to it from an app

       like this. */

    /* Set the size of the file to upload (optional).  If you give a *_LARGE

       option you MUST make sure that the type of the passed-in argument is a

       curl_off_t. If you use CURLOPT_INFILESIZE (without _LARGE) you must