客户端调用COM, 实现接口调用和COM事件通知

//################################################
// 必须要注意的是：
// (1) 必须要用 #import "XXXX/HelloWorld.dll", 此时彼编译，编译器会生成
//     helloworld.tlh, helloworld.tli
//
// (2) 必须要设置命名空间 using namespace HelloWorldLib;
//################################################

// 必须要实现下面的接口
class coCallBack: public IDispatch
{
public:
virtual HRESULT STDMETHODCALLTYPE GetTypeInfoCount(
/* [out] */ UINT *pctinfo)
{
return E_NOTIMPL;
}

virtual HRESULT STDMETHODCALLTYPE GetTypeInfo(
/* [in] */ UINT iTInfo,
/* [in] */ LCID lcid,
/* [out] */ ITypeInfo **ppTInfo)
{
return E_NOTIMPL;
}

virtual HRESULT STDMETHODCALLTYPE GetIDsOfNames(
/* [in] */ REFIID riid,
/* [size_is][in] */ LPOLESTR *rgszNames,
/* [in] */ UINT cNames,
/* [in] */ LCID lcid,
/* [size_is][out] */ DISPID *rgDispId)
{
return E_NOTIMPL;
}

virtual /* [local] */ HRESULT STDMETHODCALLTYPE Invoke(
/* [in] */ DISPID dispIdMember,
/* [in] */ REFIID riid,
/* [in] */ LCID lcid,
/* [in] */ WORD wFlags,
/* [out][in] */ DISPPARAMS *pDispParams,
/* [out] */ VARIANT *pVarResult,
/* [out] */ EXCEPINFO *pExcepInfo,
/* [out] */ UINT *puArgErr)
{
MessageBox(NULL, "1111111", "2222222", MB_OK);

return S_OK;
}

STDMETHOD_(ULONG, AddRef)()
{
return E_NOTIMPL;
}

STDMETHOD_(ULONG, Release)()
{

return E_NOTIMPL;
}

STDMETHOD(QueryInterface)(REFIID riid, void ** ppvObject)
{
*ppvObject = this; //调试发现
return S_OK;
}

};

coCallBack  gpcallback;

int _tmain(int argc, _TCHAR* argv[])
{
CoInitialize(NULL);

// 获DLL中接口类的对象
IhelloATLControlPtr   lcmHelloObj;
HRESULT hRt = lcmHelloObj.CreateInstance( __uuidof(helloATLControl) );
if (hRt == S_OK)
{
// 执行导出函数功能
lcmHelloObj->ExportFun1();
}

// 把本程序的回调类, 添加到 COM 中的连接容器中(vect 中),COM 中调用容器中的所有类回调函数，通知Client
IConnectionPointContainer  *lpConnectionPointContainer = NULL;
lcmHelloObj.QueryInterface(IID_IConnectionPointContainer, (void **)&lpConnectionPointContainer );
if(lpConnectionPointContainer)
{
IConnectionPoint	*lpConnectionPoint=NULL;
lpConnectionPointContainer->FindConnectionPoint ( __uuidof(_IhelloATLControlEvents), &lpConnectionPoint);

lpConnectionPointContainer->Release();
lpConnectionPointContainer = NULL;

if (lpConnectionPoint)
{
DWORD  ldwCookie=0;
// 添加到COM中的类容器中
lpConnectionPoint->Advise( &gpcallback, &ldwCookie);
}
}

lcmHelloObj->ExportFun1();
lcmHelloObj = NULL;

CoUninitialize();

return 0;
}