84 lines
1.7 KiB
C++
84 lines
1.7 KiB
C++
//=======================================================================
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//
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// Copyright (c) 2001 Microsoft Corporation. All Rights Reserved.
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//
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// File: customlbacc.h
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//
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// Creator: weiw
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//
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// Purpose: custom list box accessibility header file
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//
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//=======================================================================
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#pragma once
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#include <pch.h>
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class MYLBAccPropServer : public IAccPropServer {
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LONG m_Ref;
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IAccPropServices * m_pAccPropSvc;
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public:
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MYLBAccPropServer(IAccPropServices * pAccPropSvc )
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: m_Ref( 1 ),
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m_pAccPropSvc( pAccPropSvc )
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{
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m_pAccPropSvc->AddRef();
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}
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~MYLBAccPropServer()
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{
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m_pAccPropSvc->Release();
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}
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// IUnknown
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STDMETHOD(QueryInterface)(REFIID riid, void **ppvObject)
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{
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HRESULT hr = S_OK;
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*ppvObject = NULL;
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if (__uuidof(IUnknown) == riid ||
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__uuidof(IAccPropServer) == riid)
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{
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*ppvObject = (void *)this;
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AddRef();
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}
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else
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{
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DEBUGMSG("MYLBAccPropServer QueryInterface(): interface not supported");
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hr = E_NOINTERFACE;
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}
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return hr;
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}
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STDMETHOD_(ULONG, AddRef)(void)
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{
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long cRef = InterlockedIncrement(&m_Ref);
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//DEBUGMSG("MYLBAccPropServer AddRef = %d", cRef);
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return cRef;
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}
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STDMETHOD_(ULONG, Release)(void)
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{
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long cRef = InterlockedDecrement(&m_Ref);
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//DEBUGMSG("MYLBAccPropServer Release = %d", cRef);
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if (0 == cRef)
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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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// IAccPropServer
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HRESULT STDMETHODCALLTYPE GetPropValue (
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const BYTE * pIDString,
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DWORD dwIDStringLen,
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MSAAPROPID idProp,
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VARIANT * pvarValue,
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BOOL * pfGotProp );
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};
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