Как использовать DLL (СОМ-объект) без регистрации (фильтр DirectShow)

// define the prototype of the class factory entry point in a COM dll
typedef HRESULT (STDAPICALLTYPE* FN_DLLGETCLASSOBJECT)(REFCLSID clsid, REFIID iid, void** ppv);
 
HRESULT CreateObjectFromPath(TCHAR* pPath, REFCLSID clsid, IUnknown** ppUnk)
{
    // load the target DLL directly
    HMODULE lib = LoadLibrary(pPath);
    if (!lib)
    {
        return HRESULT_FROM_WIN32(GetLastError());
    }
 
    // the entry point is an exported function
    FN_DLLGETCLASSOBJECT fn = (FN_DLLGETCLASSOBJECT)GetProcAddress(lib, "DllGetClassObject");
    if (fn == NULL)
    {
        return HRESULT_FROM_WIN32(GetLastError());
    }
 
    // create a class factory
    IUnknownPtr pUnk;
    HRESULT hr = fn(clsid,  IID_IUnknown,  (void**)(IUnknown**)&pUnk);
    if (SUCCEEDED(hr))
    {
        IClassFactoryPtr pCF = pUnk;
        if (pCF == NULL)
        {
            hr = E_NOINTERFACE;
        }
        else
        {
            // ask the class factory to create the object
            hr = pCF->CreateInstance(NULL, IID_IUnknown, (void**)ppUnk);
        }
    }
 
    return hr;
}
...................................................
IUnknownPtr pUnk;
HRESULT hr = CreateObjectFromPath(TEXT("c:\\path\\to\\myfilter.dll"), IID_MyFilter, &pUnk);
if (SUCCEEDED(hr))
{
    IBaseFilterPtr pFilter = pUnk;
    pGraph->AddFilter(pFilter, L"Private Filter");
    pGraph->RenderFile(pMediaClip, NULL);
}

//  CDump object which has filter and pin members
class CDump : public CUnknown, public IFileSinkFilter, public IMyInterface
{
    friend class CDumpFilter;
    friend class CDumpInputPin;
 
    CDumpFilter   *m_pFilter;       // Methods for filter interfaces
    CDumpInputPin *m_pPin;          // A simple rendered input pin

DEFINE_GUID(IID_MyInterface,
    0x11b86ee6, 0x8d30, 0x46ea, 0xb1, 0x82, 0xea, 0xd1, 0x85, 0xd, 0x50, 0x3e);
 
class IMyInterface : public IUnknown {
 
public:
    HRESULT STDMETHODCALLTYPE Test1() {return 1;};
 
    HRESULT STDMETHODCALLTYPE Test2() = 0 {return 2;};
};

//
// NonDelegatingQueryInterface
//
// Override this to say what interfaces we support where
//
STDMETHODIMP CDump::NonDelegatingQueryInterface(REFIID riid, void ** ppv)
{
    CheckPointer(ppv,E_POINTER);
    CAutoLock lock(&m_Lock);
 
    // Do we have this interface
 
    if (riid == IID_MyInterface) {
        return GetInterface((IMyInterface*)this, ppv);
    }
    else

           // Получаем наш интерфейс для обмена данными с фильтром
            IDumpInterface* pDumpInterface;
            hr5 = pUnk->QueryInterface(IID_DumpInterface, (void**)&pDumpInterface);
            std::cout << "Query our DUMP interface. Result = " << hr5 << std::endl;

// Интерфейс для взаимодействия основной программы с фильтром
// {11B86EE6-8D30-46EA-B182-EAD1850D503E}
DEFINE_GUID(IID_DumpInterface,
    0x11b86ee6, 0x8d30, 0x46ea, 0xb1, 0x82, 0xea, 0xd1, 0x85, 0xd, 0x50, 0x3e);
 
class IMyInterface : public IUnknown {
 
public:
    HRESULT STDMETHODCALLTYPE Test1() {return 1;};
 
    HRESULT STDMETHODCALLTYPE Test2() = 0 {return 2;};
};

DECLARE_INTERFACE_(IIPEffect, IUnknown)
{
    STDMETHOD(get_IPEffect) (THIS_
                int *effectNum,         // The current effect
                REFTIME *StartTime,     // Start time of effect
                REFTIME *Length         // length of effect
             ) PURE;
 
    STDMETHOD(put_IPEffect) (THIS_
                int effectNum,          // Change to this effect
                REFTIME StartTime,      // Start time of effect
                REFTIME Length          // Length of effect
             ) PURE;
};