std::string str = "string";
CString csRet;
// csRet.Format("%s", str.c_str());
// 如果上句报错就使用
csRet.Format(_T("%s"), str.c_str());

CString cstr("string");

string 

#include <string>
#include <locale>
#include <codecvt>
 
//convert string to wstring
inline std::wstring to_wide_string(const std::string& input)
{
	std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
	return converter.from_bytes(input);
}

wstring stringToWstring(std::string str)
{
    wstring result = L"";
    int nLen = MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.size(), NULL, 0);

    if (nLen == 0)
        return result;

    TCHAR* buffer = new TCHAR[nLen + 1];
    MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.size(), buffer, nLen);

    buffer[nLen] = '\0';
    result.append(buffer);

    delete[] buffer;
    return result;
}

//convert wstring to string 
inline std::string to_byte_string(const std::wstring& input)
{
	std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
	return converter.to_bytes(input);
}

string DwordToString(DWORD val)
{
	string cur_str = to_string(long long (val));
	return cur_str;
}

DWORD StringToDword(string val)
{
	DWORD cur_dword;
	sscanf(val.c_str(),"%ul",&cur_dword);
	return cur_dword;
}