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我在这里尝试做的只是创建一个接口的实例。真的应该这么简单。一直在关注任何在线材料，阅读我能找到但无法终生解决这个问题的材料。

它归结为从 CoCreateInstance 返回的 HRESULT 是 E_INVALIDARG。我已经尽可能多地更改了参数以尝试使其工作，但仍然无法获得它。所以请看一眼，希望有人能指出我正在寻找的一些简单的东西。

//Instantiate the sink class and hold a pointer to it.
    m_pSink = new CSink();

    HRESULT hr = CoInitialize(NULL);

    //Get a pointer to sinks IUnknown, no AddRef. CMySink implements only
    //dispinterface and the IUnknown and IDispatch pointers will be same.
    LPUNKNOWN pUnkSink = m_pSink->GetIDispatch(FALSE); 

    CLSID clsidInterface;
    hr = CLSIDFromProgID(L"Automation.AutomationInterface", &clsidInterface);

    ICALib::IAutomationInterface *p_Interface = NULL;
    hr = CoCreateInstance(clsidInterface, NULL, CLSCTX_LOCAL_SERVER, ICALib::IID_IAutomationInterface, (void**)p_Interface);

    if (hr != S_OK) // Show a message box if the Instance of the interface is not created and do not create the object.
    {
        CMessageBox(CMessageBox::WARNING_OK).Show(IDS_WARNING_BADLICENSE);
        m_failedToCreate = TRUE;
        this->~CMainClass();
        return;
    }

    //Establish a connection between source and sink.
    //m_pUnkSrc is IUnknown of server obtained by CoCreateInstance().
    //m_dwCookie is a cookie identifying the connection, and is needed to terminate the connection.
    BOOL result = AfxConnectionAdvise(p_Interface, m_pSink->GetGUID(), pUnkSink, FALSE, &m_dwCookie);

（由于法律责任，本代码中未显示实际名称）

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1 回答 1

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您需要获取的地址p_Interface并将其传递给CoCreateInstance. 实际上，您只是为最后一个参数传递了一个 NULL 指针。

于 2014-09-04T15:16:15.690 回答