CoGetClassObject( ) and Shell extension
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Hello all, In my shell extension dll, there are some codes like that (call another COM component): ...... hr = CoGetClassObject(CLSID_Class1, CLSCTX_ALL, NULL, IID_IClassFactory, (void**)&pcf); (now hr = S_OK) hr = pcf->CreateInstance(NULL, IID_Interface1, (void**)&pi); (ERROR: "Can't find the registered interface") CLSID_Class1 is also a COM component written by myself and I've written a simple exe app to test this component and find it runs ok. So it means the GUIDs have been registered in the registry successfully and the component itself is correct. Why the shell extension dll calls the CLSID_Class1 component will be fail but the exe application calls it successfully? Both the shell extension COM and CLSID_Class COM are all "Apartment" thread model. Thanks a lot