42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
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// eventcallback.h
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#ifndef _INC_EVENT_CALLBACK
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#define _INC_EVENT_CALLBACK
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#define ID_WIAEVENT_CONNECT 0
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#define ID_WIAEVENT_DISCONNECT 1
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/////////////////////////////////////////////////////////////////////////////
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// CEventCallback
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class CEventCallback : public IWiaEventCallback
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{
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private:
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ULONG m_cRef; // Object reference count.
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int m_EventID; // What kind of event is this callback for?
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public:
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IUnknown *m_pIUnkRelease; // release server registration
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public:
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// Constructor, initialization and destructor methods.
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CEventCallback();
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~CEventCallback();
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// IUnknown members that delegate to m_pUnkRef.
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HRESULT _stdcall QueryInterface(const IID&,void**);
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ULONG _stdcall AddRef();
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ULONG _stdcall Release();
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HRESULT _stdcall Initialize(int EventID);
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HRESULT _stdcall ImageEventCallback(
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const GUID *pEventGUID,
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BSTR bstrEventDescription,
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BSTR bstrDeviceID,
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BSTR bstrDeviceDescription,
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DWORD dwDeviceType,
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BSTR bstrFullItemName,
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ULONG *plEventType,
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ULONG ulReserved);
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};
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#endif
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