//《精通.NET互操作：P/Invoke、C++ Interop和COM Interop》
//ms-help://MS.VSCC.v90/MS.MSDNQTR.v90.chs/dv_vccore/html/79e2537e-d4eb-459f-9506-0e738045b59e.htm
// convert_system_string.cpp
// compile with: /clr
#include <string>
#include <iostream>
using namespace std;
using namespace System;
void MarshalString ( String ^ s, string& os ) {
using namespace Runtime::InteropServices;
const char* chars =
(const char*)(Marshal::StringToHGlobalAnsi(s)).ToPointer();
os = chars;
Marshal::FreeHGlobal(IntPtr((void*)chars));
}
void MarshalString ( String ^ s, wstring& os ) {
using namespace Runtime::InteropServices;
const wchar_t* chars =
(const wchar_t*)(Marshal::StringToHGlobalUni(s)).ToPointer();
os = chars;
Marshal::FreeHGlobal(IntPtr((void*)chars));
}
int main() {
string a = "test";
wstring b = L"test2";
String ^ c = gcnew String("abcd");
cout << a << endl;
MarshalString(c, a);
c = "efgh";
MarshalString(c, b);
cout << a << endl;
wcout << b << endl;
}