最初的代码源自free2000fly的一个标准的 COM 连接点接收器(Sink)的实现, 使用相当简单!!!，作者封装了不少工作，但调用时的代码还可以再封装一下，最后只要拷贝并修改Sink实现类的Invoke就好了。
以下是这个代码的头文件 "sinkimpl.h"，比free2000fly的"sinkimpl.h"多了一个模板类ConnectionPointerHelper<>
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#if !defined( __sinkimpl_h_INCLUDED__ )#define __sinkimpl_h_INCLUDED__ #if _MSC_VER > 1000#pragma once#endif // _MSC_VER > 1000template<typename
T, typename
EventInterface, const
GUID * evtLibID = NULL >class
ATL_NO_VTABLE CSinkImpT : public
CComObjectRootEx<CComSingleThreadModel> , public
CComCoClass<CSinkImpT<T, EventInterface, evtLibID>, &__uuidof(T)> , public
IDispatchImpl < EventInterface, &__uuidof(EventInterface), evtLibID >{public: CSinkImpT() {} virtual
~CSinkImpT() {} typedef
IDispatchImpl<EventInterface, &__uuidof(EventInterface), evtLibID> _parentClass; typedef
CSinkImpT<T, EventInterface, evtLibID> _thisClass; STDMETHOD( Invoke )(DISPID dispidMember, REFIID riid, LCID
lcid, WORD
wFlags, DISPPARAMS* pdispparams, VARIANT* pvarResult, EXCEPINFO* pexcepinfo, UINT* puArgErr) { T * pThis = static_cast<T *>(this); return
pThis->DoInvoke( dispidMember, riid, lcid, wFlags, pdispparams, pvarResult, pexcepinfo, puArgErr ); } DECLARE_NO_REGISTRY() DECLARE_PROTECT_FINAL_CONSTRUCT() BEGIN_COM_MAP( _thisClass ) COM_INTERFACE_ENTRY( IDispatch ) COM_INTERFACE_ENTRY( EventInterface ) END_COM_MAP(); STDMETHOD( DoInvoke )(DISPID dispidMember, REFIID riid, LCID
lcid, WORD
wFlags, DISPPARAMS* pdispparams, VARIANT* pvarResult, EXCEPINFO* pexcepinfo, UINT* puArgErr) { return
_parentClass::Invoke( dispidMember, riid, lcid, wFlags, pdispparams, pvarResult, pexcepinfo, puArgErr ); }};inline
HRESULT WINAPI GetConnectPoint( IUnknown * pItf, const
IID & rSinkIID, IConnectionPoint ** ppCP ){ HRESULT
hr = E_FAIL; do { if
( pItf == NULL || ppCP == NULL ) { break; } CComQIPtr<IConnectionPointContainer> spContainer; hr = pItf->QueryInterface( &spContainer ); if
( FAILED( hr ) ) { break; } hr = spContainer->FindConnectionPoint( rSinkIID, ppCP ); } while
( FALSE ); return
hr;}///////////////////////////////////////////////////////////////////////////////////////////////////////// 使用方法：// ComDllLib::ITestComPtr pCom;// HRESULT hr = pCom.CreateInstance( L"Test.Com" );// ConnectionPointHelper<ComDllLib::_ITestComEvent, CSink3> cph( pCom );//template<typename
EventInterface, typename
EventProcessor>class
ConnectionPointHelper{ CComPtr<IUnknown> m_spInterface; DWORD
m_dwCookie;public: ConnectionPointHelper( IUnknown* pInterface ) : m_spInterface( pInterface ), m_dwCookie( 0 ) { Connect(); } ~ConnectionPointHelper() { Disconnect(); }protected: void
Connect() { HRESULT
hr = E_FAIL; do { if
( m_spInterface == NULL || m_dwCookie != 0 ) { break; } CComQIPtr<IConnectionPoint> spCP; hr = GetConnectPoint( m_spInterface, __uuidof(EventInterface), &spCP ); if
( FAILED( hr ) ){ break; } CComQIPtr<IDispatch> spSink; { CComObject<EventProcessor> * pTmp = NULL; hr = CComObject<EventProcessor>::CreateInstance( &pTmp ); if
( FAILED( hr ) ){ break; } pTmp->AddRef(); hr = pTmp->QueryInterface( &spSink ); pTmp->Release(); if
( FAILED( hr ) ){ break; } } spCP->Advise( spSink, &m_dwCookie ); } while
( FALSE ); } void
Disconnect() { HRESULT
hr = E_FAIL; do
{ if
( m_dwCookie == 0 ) { break; } CComQIPtr<IConnectionPoint> spCP; hr = GetConnectPoint( m_spInterface, __uuidof(EventInterface), &spCP ); if
( FAILED( hr ) ){ break; } hr = spCP->Unadvise( m_dwCookie ); m_dwCookie = 0; } while
( FALSE ); }};#endif // !defined( __sinkimpl_h_INCLUDED__ ) |
使用方法：
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UIAddChildWindowContainer( m_hWnd );ComDllLib::ITestComPtr pCom;CComPtr<IUnknown> pUnknown;HRESULT
hr = pCom.CreateInstance( L"Test.Com"
);if (SUCCEEDED(hr)){ hr = pCom->QueryInterface( IID_IUnknown, reinterpret_cast<void**>(&pUnknown) ); if
( SUCCEEDED( hr ) ) { ConnectionPointHelper<ComDllLib::_ITestComEvent, CSink3> cph( pUnknown ); LONG
c = pCom->Add( 1, 5 ); }} |
CSink3的实现（与free2000fly写的一样）：
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// 要响应连接点事件，只需要重写此类// class
DECLSPEC_UUID( "492194D9-7BEE-422D-AE7C-C43A809F20EC"
) CSink3;class
ATL_NO_VTABLE CSink3 : public
CSinkImpT < CSink3, ComDllLib::_ITestComEvent >{public: CSink3( void
) { } virtual
~CSink3( void
) {} typedef
CSinkImpT<CSink3, ComDllLib::_ITestComEvent> _parentClass; STDMETHOD( DoInvoke )(DISPID dispidMember, REFIID riid, LCID
lcid, WORD
wFlags, DISPPARAMS* pdispparams, VARIANT* pvarResult, EXCEPINFO* pexcepinfo, UINT* puArgErr) { // 3. the dispidMember must referenced from .thl file, and you can have a look using oleview.exe switch
( dispidMember ) { case
1: { CComVariant result( *pvarResult ); if
( SUCCEEDED( result.ChangeType( VT_BSTR ) ) ) ::MessageBoxW( ::GetActiveWindow(), result.bstrVal, L"Sink Message", MB_OK ); return
S_OK; } default: break; } return
_parentClass::DoInvoke( dispidMember, riid, lcid, wFlags, pdispparams, pvarResult, pexcepinfo, puArgErr ); }}; |
借助模板类自动实现COM连接点接收器（Sink）,布布扣,bubuko.com
原文：http://www.cnblogs.com/honker/p/3773048.html