TCHAR    AppRunPath[MAX_PATH];
TCHAR    LISTFILE[MAX_PATH];
    
_wgetdcwd(_getdrive(),AppRunPath,_MAX_PATH);
swprintf(LISTFILE,MAX_PATH,L"%s\\%s",AppRunPath, _T("a.csv"));
    
TCHAR  str[20];
CFile file;
if( !file.Open(LISTFILE,CFile::modeReadWrite ) ) {
    if( file.Open(LISTFILE,CFile::modeCreate | CFile::modeWrite) )        
        memset(str,0x20,40);
        wcscpy(str, _T("我们"));    
        file.Write(str,40);            
    }
file.Close();