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Too many callbacks after installing multiple event handlers

    Question


  • CoInitializeEx(NULL,COINIT_MULTITHREADED);
    CoCreateInstance(CLSID_CUIAutomation, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pAutomation));

    MyEventHandler* handler1 = new MyEventHandler(); MyEventHandler* handler2 = new MyEventHandler();
    AnotherEventHandler* handler3 = new AnotherEventHandler(); pAutomation->AddStructureChangedEventHandler(element, TreeScope_Element, NULL, handler1 ); pAutomation->AddStructureChangedEventHandler(differentelement, TreeScope_Element, NULL, handler2 );
    pAutomation->AddStructureChangedEventHandler(anotherelement, TreeScope_Element, NULL, handler3 );

    Any events in any of the automation elements will trigger all event handlers callback functions

    How do we avoid this?




    Friday, February 08, 2013 10:18 PM