检测文件存在的四种方法

http://www.cppblog.com/alantop/archive/2006/05/10/6871.html

1.
WIN32_FIND_DATA m_data;
HANDLE hFile;

hFile=FindFirstFile(filename,&m_data)

if(hFile==INVALID_HANDLE_VALUE) //file not found

Make sure you close the handle if the file is found. 

FindClose(hFile);

2.
You can use SHGetFileInfo()
The prototype of the function is as follows:

DWORD_PTR SHGetFileInfo( 
LPCTSTR pszPath,
DWORD dwFileAttributes,
SHFILEINFO *psfi,
UINT cbFileInfo,
UINT uFlags
);

3.
PathFileExists 

4. 加一个标准c库函数

Example

/* ACCESS.C: This example uses _access to check the
 * file named "ACCESS.C" to see if it exists and if
 * writing is allowed.
 */

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

void main( void )
{
   /* Check for existence */
   if( (_access( "ACCESS.C", 0 )) != -1 )
   {
      printf( "File ACCESS.C exists\n" );
      /* Check for write permission */
      if( (_access( "ACCESS.C", 2 )) != -1 )
         printf( "File ACCESS.C has write permission\n" );
   }
}