51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
/*******************************************************************************
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*
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* (C) COPYRIGHT MICROSOFT CORP., 1998
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*
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* TITLE: CallBack.h
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*
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* VERSION: 2.0
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*
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* AUTHOR: ReedB
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*
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* DATE: 4 Aug, 1998
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*
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* DESCRIPTION:
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* Declarations and definitions for the WIA device class driver callbacks.
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*
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*******************************************************************************/
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class CEventCallback : public IWiaEventCallback
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{
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public:
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// Constructor, initialization and destructor methods.
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CEventCallback();
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HRESULT _stdcall Initialize();
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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 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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private:
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ULONG m_cRef; // Object reference count.
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};
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// Public prototypes
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HRESULT RegisterForWIAEvents(IWiaEventCallback** ppIWiaEventCallback);
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