raii_sample_01

class handle_placeholder
{
public:
	handle_placeholder(HANDLE handle): _handle(handle){}
	~handle_placeholder(){ close(); }

	void close() 
	{ 
		if (INVALID_HANDLE_VALUE != _handle)
		{
			CloseHandle(_handle);  
			_handle = INVALID_HANDLE_VALUE; 
		}
	}
	HANDLE get() { return _handle; }
private:
	HANDLE _handle;
};