unresolved external symbol _wfopen

[DanielFFF]

Please treat me as an absolute beginner in VS Express 2013, and also pretty raw at C programming!

I'm writing a program to read a UTF-8 .txt file containing Win7 filenames containing UTF-8 characters (accented foreign characters, for example). I then wish to do some processing on those names and write them back out to a UTF-8 batch file to run in a DOS window.

Here are a few pertinent extracts from my .C file:

#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <wchar.h>
#include <string.h>
#include <ctype.h>
#include <io.h>
#include <errno.h>
#include <process.h>

#define UNICODE // don't know if these actually achieve anything, but
#define _UNICODE // eventually I want the code to be UTF-8 compliant

.....

void
main(sShort_16 argCount, sChar_8 *argValue[])
{
.....

if ((listIn = _wfopen(ucOldNames, L"rt+, ccs=UTF-8")) == NULL)
{ // no file list
puts("\nCan't open file list!");
exit(1);
}


My problem is that compiling my program from a Developer Command Prompt for VS2013, using

cl makexxx.c

throws up this error (as well as a number of warnings):

unresolved external symbol _wfopen

My understanding is that _wfopen is an available function in VS Express 2013. So why do I get this error, and how do I avoid it?

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