how i can check if a file exists in a specific directory?

i have a directory at C:\helo\one.txt
how can i check if this file exists in the directory?

You can use this CRT function ...

#include <io.h>

int _access(const char *path, int mode);

00 Existence only
02 Write permission
04 Read permission
06 Read and write permission

A zero return means the file is accessible (exists).

-rick

i use it like this

#include <io.h>
#include <stdio.h>
#include <stdlib.h>

if ( (_access("C:/one.txt",0))== -1)
{
MessageBox("File Does Not Exists");
}

but i have an error saying

'_access' undeclared indentifier

what is wrong?

its ok nothing is wrong i just had to put the include files after the

#include "stdafx.h"

like this
#include "stdafx.h"
#include <io.h>
#include <stdio.h>
#include <stdlib.h>

Code:

---

CString szPath("c:\\windows");

DWORD dwAttr = GetFileAttributes(szPath);
if (dwAttr == 0xffffffff)
{
  DWORD dwError = GetLastError();
  if (dwError == ERROR_FILE_NOT_FOUND)
  {
    // file not found
  }
  else if (dwError == ERROR_PATH_NOT_FOUND)
  {
    // path not found
  }
  else if (dwError == ERROR_ACCESS_DENIED)
  {
    // file or directory exists, but access is denied
  }
  else
  {
    // some other error has occured
  }
}
else
{
  if (dwAttr & FILE_ATTRIBUTE_DIRECTORY)
  {
    // this is a directory
  }
  else
  {
    // this is an ordinary file
  }
}

---