UTF-8转宽字节UTF8ToWchar

BOOL UTF8ToWchar(std::string src, std::wstring& dest)

BOOL UTF8ToWchar(std::string src, std::wstring& dest)
{
    //预转换，得到所需空间的大小;
    int wcsLen = ::MultiByteToWideChar(CP_UTF8, NULL, src.c_str(), (int)src.size(), NULL, 0);
    if (wcsLen == 0)
    {
        return 0;
    }
    dest.resize(wcsLen);
    int nLen = ::MultiByteToWideChar(CP_UTF8, NULL, src.c_str(), (int)src.size(), &dest.at(0), wcsLen);
    return wcsLen > 0;
}