Following my research on implementing a View/Model/ViewModel framework, I've found the following gem:

Last month I answered a question about implementing native events in C++ (see C++ At Work: Event Programming). I discussed events in general and showed how to use an interface to define event handlers for your class that clients must implement to handle events. My implementation had some shortcomings that I promised to resolve in the sequel, so here I am to finish the story.
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Pascal