string UTF8ToGBK(const std::string& strUTF8)

{

    int len = MultiByteToWideChar(CP_UTF8, , strUTF8.c_str(), -, NULL, );

    WCHAR* wszGBK = new WCHAR[len+];

    memset(wszGBK, , len *  + );

    MultiByteToWideChar(CP_UTF8, , (LPCTSTR)strUTF8.c_str(), -, wszGBK, len);  

    len = WideCharToMultiByte(CP_ACP, , wszGBK, -, NULL, , NULL, NULL);

    char *szGBK = new char[len + ];

    memset(szGBK, , len + );

    WideCharToMultiByte(CP_ACP,, wszGBK, -, szGBK, len, NULL, NULL);

    std::string strTemp(szGBK);

    delete[]szGBK;

    delete[]wszGBK;

    return strTemp;

} 

string GBKToUTF8(const std::string& strGBK)

{

    string strOutUTF8 = "";

    WCHAR * str1;

    int n = MultiByteToWideChar(CP_ACP, , strGBK.c_str(), -, NULL, );

    str1 = new WCHAR[n];

    MultiByteToWideChar(CP_ACP, , strGBK.c_str(), -, str1, n);

    n = WideCharToMultiByte(CP_UTF8, , str1, -, NULL, , NULL, NULL);

    char * str2 = new char[n];

    WideCharToMultiByte(CP_UTF8, , str1, -, str2, n, NULL, NULL);

    strOutUTF8 = str2;

    delete[]str1;

    str1 = NULL;

    delete[]str2;

    str2 = NULL;

    return strOutUTF8;

}