VC++实现COM事件接收器

1、给程序添加ATL支持。

　　右键->New ATL Object

　　2、实现IDispEventImpl 接口。

　　//EventSink.h
#import "..\Server\Debug\Server.exe" raw_interface_only,no_namespace,named_guids
class　CEventSink :
 public IDispEventImpl<0, CEventSink,&DIID__IObjEvents,&LIBID_SERVERLib, 1, 0>
{
public:
 CEventSink()
 {
 }
public:
 BEGIN_SINK_MAP(CEventSink)
　 SINK_ENTRY_EX(0, DIID__IObjEvents, 1, cbFunc01)
 END_SINK_MAP()
 STDMETHOD(cbFunc01)();
};

//EventSink.cpp
#include "stdafx.h"
#include "EventSink.h"
STDMETHODIMP CEventSink::cbFunc01()
{
 AfxMessageBox("called by Event from dll Server !");
return S_OK;
}

　　3、连接对象

　　// ClientDlg.cpp : implementation file
//
#include "EventSink.h"

void CClientDlg::OnButton1()
{
 // TODO: Add your control notification handler code here
 ::CoInitialize(NULL);
 {
　 IObjPtr pObj;
　 CEventSink *pEventSink= new CEventSink;
　 pObj.CreateInstance(__uuidof(Obj));
　 pEventSink->DispEventAdvise(pObj);
　 pObj->Func01();
　 pEventSink->DispEventUnadvise(pObj);
　 delete pEventSink;
 }
 ::CoUninitialize();
}