Question

I have a function in C++ that have a value in std::string type and would like to convert it to String^.

void(String ^outValue)
{
   std::string str("Hello World");
   outValue = str;
}

Answer 1

Googling reveals marshal_as (untested):

// marshal_as_test.cpp
// compile with: /clr
#include <stdlib.h>
#include <string>
#include <msclr\marshal_cppstd.h>

using namespace System;
using namespace msclr::interop;

int main() {
   std::string message = "Test String to Marshal";
   String^ result;
   result = marshal_as<String^>( message );
   return 0;
}

Also see Overview of Marshaling.