Handling COM events

[SebastianStricker]

I have a question to the COM/ATL experts: how can I handle events fired by an application I created via a smart pointer ("CreateInstance&quot?

I know that in the namespace of the imported DLL from the program (which I created with "CreateInstance&quot there is an abstract base class for event handling (lets say "_IEvent&quot.

I tried to create my own event handling class derived from IDispatchImpl<_IEvent,...> and CComObjectRoot. Then I overrided the event-handling functions existing in the abstract _IEvent class in my new event handling class. Furthermore I created a COM_MAP with two entries for &quot;IDispatch&quot; and &quot;_IEvent&quot; in the header.

Then I call AtlAdvise with the both IUnknown pointers to the object and my class. As IID I used the GUID of the abstract _IEvent class (don't know if this is right??)

There seems to be a valid connection, but nothing happens if the created instance fires COM events? I think it is possible that there is no connection between the messages and the functions.

Any ideas?

THX Sebastian

 

[Cagliostro]

you should use at least IAdviseSink.
CComPtr<IOleObject> xxx;
yourObject->QueryInterface(&xxx);
IAdviseSink* yy = new ...;
DWORD connection;
xxx->advise(yy, &connection);
......
...
xxx->Unadvise(&connection);//after finished working


Ion Filipski

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