124 lines
1.8 KiB
C++
124 lines
1.8 KiB
C++
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/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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EventCallback.cpp
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Abstract:
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Author:
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Hakki T. Bostanci (hakkib) 06-Apr-2000
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Revision History:
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--*/
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#include "StdAfx.h"
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#include "WiaStress.h"
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#include "EventCallback.h"
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//////////////////////////////////////////////////////////////////////////
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//
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//
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//
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CEventCallback::CEventCallback()
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{
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m_cRef = 0;
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}
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//////////////////////////////////////////////////////////////////////////
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//
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//
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//
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CEventCallback::~CEventCallback()
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{
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}
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//////////////////////////////////////////////////////////////////////////
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//
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//
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//
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STDMETHODIMP CEventCallback::QueryInterface(REFIID iid, LPVOID *ppvObj)
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{
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if (ppvObj == 0)
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{
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return E_POINTER;
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}
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if (iid == IID_IUnknown)
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{
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AddRef();
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*ppvObj = (IUnknown*) this;
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return S_OK;
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}
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if (iid == IID_IWiaEventCallback)
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{
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AddRef();
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*ppvObj = (IWiaEventCallback *) this;
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return S_OK;
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}
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*ppvObj = 0;
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return E_NOINTERFACE;
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}
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//////////////////////////////////////////////////////////////////////////
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//
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//
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//
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STDMETHODIMP_(ULONG) CEventCallback::AddRef()
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{
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return InterlockedIncrement(&m_cRef);
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}
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//////////////////////////////////////////////////////////////////////////
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//
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//
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//
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STDMETHODIMP_(ULONG) CEventCallback::Release()
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{
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LONG cRef = InterlockedDecrement(&m_cRef);
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if (cRef == 0)
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{
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delete this;
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}
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return cRef;
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}
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//////////////////////////////////////////////////////////////////////////
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//
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//
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//
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STDMETHODIMP
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CEventCallback::ImageEventCallback(
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LPCGUID 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 *pulEventType,
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ULONG ulReserved
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)
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{
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return S_OK;
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}
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