std::string ws2s(const std::wstring& str)

{

    char*     pElementText;

    int    iTextLen;

    // wide char to multi char

    iTextLen = WideCharToMultiByte(CP_ACP, , str.c_str(), -, NULL, , NULL, NULL);

    pElementText = new char[iTextLen + ];

    memset((void*)pElementText, , sizeof(char)* (iTextLen + ));

    ::WideCharToMultiByte(CP_ACP, , str.c_str(), -, pElementText, iTextLen, NULL, NULL);

    std::string strText;

    strText = pElementText;

    delete[] pElementText;

    return strText;

}

std::string strKEy = ws2s(pKey);//pKey为WCHAR类型

    char pStr[] = {};

    strcpy_s(pStr, , strKEy.c_str());