Unicode字符集下WriteFile中文处理

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最近在使用WriteFile函数时发现,vc2008中unicode字符集下处理中文乱码的一些解决方法，归纳如下

1. 写入的时候采用多字节char类型

    HANDLE hFile;    DWORD nBytes;    hFile=CreateFile(_T("test.txt"),GENERIC_WRITE,FILE_SHARE_WRITE,NULL,CREATE_ALWAYS,0,NULL);    char msg[]="我是我的我";    if(hFile!=INVALID_HANDLE_VALUE)    {       WriteFile(hFile,msg, sizeof(msg) ,&nBytes,NULL);       CloseHandle(hFile);    }

2. 直接写入unicode的头字节

    HANDLE hFile;     DWORD nBytes;     hFile=CreateFile(_T("test.out"),GENERIC_WRITE,FILE_SHARE_WRITE,NULL,CREATE_ALWAYS,0,NULL);     WCHAR msg[]=L"我是我的我";     if(hFile!=INVALID_HANDLE_VALUE)     {         WORD a=0xFEFF;         WriteFile(hFile,&a,sizeof(a),&nBytes,NULL);         WriteFile(hFile,msg, lstrlen(msg) * sizeof(TCHAR),&nBytes,NULL);         CloseHandle(hFile);     }

3. 使用wcstombs转换成多字节,需要引用wchar.h和locale.h

  HANDLE hFile;     DWORD nBytes;     hFile=CreateFile(_T("test.out"),GENERIC_WRITE,FILE_SHARE_WRITE,NULL,CREATE_ALWAYS,0,NULL);     WCHAR msg[]=L"我是我的我";     if(hFile!=INVALID_HANDLE_VALUE)     {           char buf[sizeof(msg)];           setlocale(LC_ALL, ".936");           wcstombs(buf, msg, sizeof(msg));           WriteFile(hFile,buf, sizeof(buf),&nBytes,NULL);           CloseHandle(hFile);     }//hFile=CreateFile(_T("test.txt"),GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_ALWAYS,0,NULL);if(hFile!=INVALID_HANDLE_VALUE){   WCHAR line[256]={0};   BOOL bResult;   bResult=ReadFile(hFile,line,sizeof(line),&nBytes,NULL);   if(nBytes!=0)   {       printf("%s\r\n",line);   }   CloseHandle(hFile);}

4. 使用WideCharToMultiByte转换成多字节

（省略）

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