VC MFC 中的字符串转换

// 宽字符转UTF8 
string EncodeUtf8(wstring in) 
{ 
    string s(in.length()*3+1,‘ ‘); 
    size_t len = ::WideCharToMultiByte(CP_UTF8, 0, in.c_str(), in.length(), &s[0], s.length(), NULL, NULL); 
    s.resize(len); 
    return s; 
} 

// UTF8 转宽字符 
wstring DecodeUtf8(string in) 
{ 
    wstring s(in.length(), _T(‘ ‘)); 
    size_t len = ::MultiByteToWideChar(CP_UTF8, 0, in.c_str(), in.length(), &s[0], s.length()); 
    s.resize(len); 
    return s; 
}