// convert_from_system_string.cpp

// compile with /clr /link comsuppw.lib



#include <iostream>

#include <stdlib.h>

#include <string>



#include "atlbase.h"

#include "atlstr.h"

#include "comutil.h"

#include "vcclr.h"



using namespace std;

using namespace System;

using namespace System::Runtime::InteropServices;



int main()

{

    String ^orig = gcnew String("Hello, World!");

    Console::WriteLine("{0} (System::String)", orig);



    pin_ptr<const wchar_t> wch = PtrToStringChars(orig);



    // Convert to a char*

    size_t origsize = wcslen(wch)   1;

    const size_t newsize = 100;

    size_t convertedChars = 0;

    char nstring[newsize];

    wcstombs_s(&convertedChars, nstring, origsize, wch, _TRUNCATE);

    strcat_s(nstring, " (char *)");

    cout << nstring << endl;



    // Convert to a wchar_t*

    wchar_t wcstring[newsize];

    wcscpy_s(wcstring, wch);

    wcscat_s(wcstring, L" (wchar_t *)");

    wcout << wcstring << endl;



    // Convert to a _bstr_t

    _bstr_t bstrt(wch);

    bstrt  = " (_bstr_t)";

    cout << bstrt << endl;



    // Convert to a CComBSTR

    CComBSTR ccombstr(wch);

    if (ccombstr.Append(L" (CComBSTR)") == S_OK)

    {

        CW2A printstr(ccombstr);

        cout << printstr << endl;

    }



    // Convert to a CString

    CString cstring(wch);

    cstring  = " (CString)";

    cout << cstring << endl;



    // Convert to a basic_string

    wstring basicstring(wch);

    basicstring  = L" (basic_string)";

    wcout << basicstring << endl;



    delete orig;

}