COM

Make Class B the friend of class A

OK,I found a very simple solution... template class CAdviSeNotify: public IConnectionPointImpl { public: typedef IConnectionPointImpl baseClass; CAdviSeNotify(){}; virtual ~CAdviSeNotify(){}; STDMETHOD(Advise)(IUnknown* pUnkSink, DWORD* pdwCookie) { T* pT = static_cast(this); pT->OnClientAdvise(pUnkSink,piid); return baseClass::Advise(pUnkSink,pdwCookie); } STDMETHOD(Unadvise)(DWORD dwCookie) { T* pT = static_cast(this); return baseClass::Unadvise(dwCookie); } };

Check the Debugging Application book by John Robbins, chapter 10 Debugging Windows 2000 Services and DLLs That Load into Services. Igor

Hi, Information about registered COM objects is stored in the registry. You can try the CLSIDFromProgID function to check if specified ProgID is registered. You can also create an instance of the object and then release it, to be 100% sure that all pieces in place. Regards, Alex Gorev, Dundas Software.

Select Tools/Customize, then select "Insert" from the "Category" combobox on the "Commands" tab. Drag the icon for the "New ATL Object" command over the "Insert" menu, and drop it into place. Thats it! Regards, Nick Hodapp

In simple terms aggregration means that the COM Component has an Internal Interface which is doing all your work though you are talking to front interface which redirects your job to its internal interface. As far as containment is correctly interpreted by me refers to the interface by which COM is exposing the rest of the interface contained inside it.

Thank you for your reply.

Hi, COM object can be stored in the DLL or EXE file. When a COM object is stored in the DLL the only difference with the usual DLL file, is that the COM DLL must have several COM related methods: DllGetClassObject DllRegisterServer DllUnregisterServer DllCanUnloadNow See description of these functions in MSDN for more details... Regards, Alex Gorev, Dundas Software.

Call CoGetClassObject() and test to see if it fails with the REGDB_E_CLASSNOTREG error: IClassFactory* pCF = NULL; HRESULT hResult = CoGetClassObject(CLSID_TheObject, NULL, CLSCTX_WHATEVER_YOU_WANT_TO_USE, (void**)&pCF); if (FAILED(hResult)) { if (hResult == REGDB_E_CLASSNOTREG) { // the server's not registered properly... } }

A GUI comes with Windows which is like MSDN! :)