Method AddRef

source/com_utils.hpp:55–58

			_ref(0), _callback(std::move(callback)) {}

		ULONG STDMETHODCALLTYPE AddRef() override
		{
			return InterlockedIncrement(&_ref);
		}
		ULONG STDMETHODCALLTYPE Release() override
		{
			const ULONG ref = InterlockedDecrement(&_ref);