DWORD GetFileSize(CString filepath)
{
    WIN32_FIND_DATA fileInfo;
    HANDLE hFind;
    DWORD fileSize;
    CString filename;
    filename = filepath;
    hFind = FindFirstFile(filename,&fileInfo);
    if(hFind != INVALID_HANDLE_VALUE)
        fileSize = fileInfo.nFileSizeLow;
   
    FindClose(hFind);
    return fileSize ;
}

int64 GetFolderSize(CString strDirPath)
{

    CString strFilePath;

    int64    dwDirSize = 0;
    strFilePath += strDirPath;
    strFilePath += "http://*.*";
    CFileFind finder;
    BOOL bFind = finder.FindFile(strFilePath);
    while (bFind)
    {
        bFind = finder.FindNextFile();
        if (!finder.IsDots())
        {
            CString strTempPath = finder.GetFilePath();
            if (!finder.IsDirectory())
            {
                dwDirSize += finder.GetLength();
            }
            else
            {
                dwDirSize += GetDirSize(strTempPath);
            }
        }
    }
    finder.Close();
    return dwDirSize;
}

  #include <Windows.h>
  #include <tchar.h>
  #include <list>
  #include <set>
  #include <cassert>
  #include <string>
  typedef std::basic_string<TCHAR> _tstring;  //寬字符串
  typedef std::list<_tstring> _tslist; //字符串鏈表
 /*

  返回文件名的鏈表。

  filepath  目錄的完整路徑，不帶//

  filefilterlist 文件擴(kuò)展名列表，可以是多種類型的組合，比如說.txt;.xls;.doc

  isordered  是否對文件名排序 

 */

_tslist  SearchFile(LPCTSTR filepath, LPCTSTR filefilterlist = _T(".*" ), bool isordered = true)

{

    assert(filepath != NULL);  

    TCHAR buffer[MAX_PATH];

#if _MSC_VER > 1310 

/* 1310 for Microsoft Visual C++ .NET 2003. 1310 represents /version 13 and a 1.0 point          release. The Visual C++ 2005 compiler version is 1400, the number.

*/

    _tcscpy_s(buffer, filepath); //_tcscpy_s is a micro for strcpy_s and strwcpy_s 

#else

    _tcscpy(buffer,filepath);  //

#endif

    _tslist filenamelist; // initial length is 100

    WIN32_FIND_DATA finddata;

    HANDLE searchhandle = INVALID_HANDLE_VALUE;

    size_t length= _tcslen(filepath);

    if (buffer[length-1] != _T('//'))
   {

        _tcscat_s(buffer,_T("http://*")); // 向字符串結(jié)尾添加/*, 用來查找所有文件
    }
    if ( (searchhandle = ::FindFirstFile(buffer, &finddata)) != INVALID_HANDLE_VALUE )
    {

      while (::FindNextFile(searchhandle, &finddata) != 0)
     {

        if ( !(finddata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) )   // 為文件            
       {
          if (  !_tcsicmp(filefilterlist, _T(".*")))   // 將所有文件輸出到鏈表

             filenamelist.push_back(finddata.cFileName);
          else
         {
            //get file filter list string, a example, file filter may be ".txt;.xls;.doc"
            _tstring filterstring = filefilterlist;
            _tstring filename(finddata.cFileName);
            _tstring::size_type index = filename.find_last_of(_T('.'));
            if (index == _tstring::npos) // 文件沒有擴(kuò)展名，跳過
               continue;
            else
           {
                 _tstring extname = filename.substr(index+1);  //取得文件的擴(kuò)展名
                _tstring::size_type exist;
                exist = filterstring.find(extname);
                if (exist != _tstring::npos)  //判斷文件的擴(kuò)展名是否在擴(kuò)展名列表里
                 filenamelist.push_back(finddata.cFileName);
              }
            }
         }
      }
    }
    ::FindClose( searchhandle );

    if (isordered)  //如果要求排序，對鏈表進(jìn)行排序
    {
        filenamelist.sort();  //list的排序采用的一般是merge sort
     }
    return filenamelist;
}

  LPCTSTR s = _T("C://temp");
  LPCTSTR s1 = _T(".txt; .xls");
  _tslist filename = SearchFile(s,s1);

  copy( filename.begin(),
            filename.end(),
            ostream_iterator<_tstring, _tstring::value_type >(wcout, _T("/n") )
          );

void SearchFile(_tslist& list, LPCTSTR filepath, LPCTSTR filefilterlist = _T(".*" ), bool isordered = true)