CString转UTF8，UTF8转CString

/*
多字节转UTF-8函数
*/
CString CNurseDialog::multiToUtf8(CString& str_multi)
{
CString str_utf8;

int len = MultiByteToWideChar(CP_ACP, 0, (LPCTSTR)str_multi, -1, NULL, 0);
wchar_t * wszUtf8 = new wchar_t[len + 1];
memset(wszUtf8, 0, len * 2 + 2);
MultiByteToWideChar(CP_ACP, 0, (LPCTSTR)str_multi, -1, wszUtf8, len);

len = WideCharToMultiByte(CP_UTF8, 0, wszUtf8, -1, NULL, 0, NULL, NULL);
char *szUtf8 = new char[len + 1];
memset(szUtf8, 0, len + 1);
WideCharToMultiByte(CP_UTF8, 0, wszUtf8, -1, szUtf8, len, NULL, NULL);

str_utf8 = szUtf8;

delete[] szUtf8;
delete[] wszUtf8;

return str_utf8;
}

/*
UTF-8转多字节函数
*/