File 존재 여부 검사

BOOL IsFileExist1( LPSTR lpszFilename ) 
{ 
    HANDLE hFile = CreateFile( lpszFilename, 0, 
           FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL ); 
    if ( hFile != INVALID_HANDLE_VALUE ) 
    { 
        CloseHandle(hFile); 
        return TRUE; 
    } 

    return FALSE; 
}    

BOOL IsFileExist2( LPSTR lpszFilename ) 
{ 
    WIN32_FIND_DATA wfd; 
  
    HANDLE hFind = FindFirstFile( lpszFilename, &wfd ); 
  
    if ( hFind == INVALID_HANDLE_VALUE ) 
        return FALSE; 

    FindClose(hFind); 
    return TRUE; 
} 

BOOL IsFileExist3( LPSTR lpszFilename ) 
{ 
    DWORD dwAttr = GetFileAttributes( lpszFilename ); 
  
  if( dwAttr = 0xffffffff ) 
        return FALSE; 
    else 
        return TRUE; 
}