Вызов управляемого кода из неуправляемого

class DotNetHostDispatcher
{
private:
	ICLRMetaHost *pMetaHost;
	ICLRRuntimeInfo *pRuntimeInfo;
	ICLRRuntimeHost *pClrRuntimeHost;
	PCWSTR pszStaticMethodName;
	DWORD dwLengthRet;
public:
	HRESULT hr;
	DotNetHostDispatcher(PCWSTR pszVersion);
	void StartMain(PCWSTR pszAssemblyPath, PCWSTR pszClassName, PCWSTR pszStringArg);
	~DotNetHostDispatcher();
};

DotNetHostDispatcher::DotNetHostDispatcher(PCWSTR pszVersion)
{
	pMetaHost = NULL;
	pRuntimeInfo = NULL;
	pClrRuntimeHost = NULL;
	pszStaticMethodName = L"Main";
	hr = CLRCreateInstance(CLSID_CLRMetaHost, IID_PPV_ARGS(&pMetaHost));
	if (FAILED(hr)) 
		throw L"CLRCreateInstance failed";
	hr = pMetaHost->GetRuntime(pszVersion, IID_PPV_ARGS(&pRuntimeInfo));
	if (FAILED(hr)) 
		throw L"ICLRMetaHost::GetRuntime failed";
	BOOL fLoadable;
	hr = pRuntimeInfo->IsLoadable(&fLoadable);
	if (FAILED(hr)) 
		throw L"ICLRRuntimeInfo::IsLoadable failed";
	if (!fLoadable) 
		throw L".NET runtime cannot be loaded";
	hr = pRuntimeInfo->GetInterface(CLSID_CLRRuntimeHost, IID_PPV_ARGS(&pClrRuntimeHost));
	if (FAILED(hr)) 
		throw L"ICLRRuntimeInfo::GetInterface failed";
	// Start the CLR.
	hr = pClrRuntimeHost->Start();
	if (FAILED(hr)) 
		throw L"CLR failed to start";
}

void DotNetHostDispatcher::StartMain(PCWSTR pszAssemblyPath, PCWSTR pszClassName, PCWSTR pszStringArg)
{
	hr = pClrRuntimeHost->
		ExecuteInDefaultAppDomain(pszAssemblyPath, pszClassName, 
				pszStaticMethodName, pszStringArg, &dwLengthRet);
}

DotNetHostDispatcher::~DotNetHostDispatcher()
{
	if (pMetaHost)
	{
		pMetaHost->Release();
		pMetaHost = NULL;
	}
	if (pRuntimeInfo)
	{
		pRuntimeInfo->Release();
		pRuntimeInfo = NULL;
	}
	if (pClrRuntimeHost)
	{
		pClrRuntimeHost->Release();
		pClrRuntimeHost = NULL;
	}
}