C / C++ / MFC

String^ ss = "hello";

std::wstring s;

array<wchar_t>^ chars = ss->ToCharArray();
pin_ptr<wchar_t> charPtr = &chars[0];
s = std::wstring(charPtr, charPtr+ss->Length);

//MyHeader.h
<a href="http://msdn.microsoft.com/en-us/library/dabb5z75(VS.80).aspx" target="_blank" title="New Window">__declspec</a>(<a href="http://msdn.microsoft.com/en-us/library/5tkz6s71(VS.80).aspx" target="_blank" title="New Window">selectany</a>) bool bVar;

//SomeFile.cpp
#include "MyHeader.h"
extern bool bVar = 0;

//AnotherFile.cpp
#include "MyHeader.h"
extern bool bVar = 1;