关于COM中ConnectionPoint的问题……各位大虾请赐教
我用VC的ATL COM AppWizad 生成一个Exe工程,创建一个Simple Com Object,并选择支持连接点(ConnectionPoint support),使用Custum, 其他选项不变。分别为两个接口(outgoing和incoming interface)添加一个方法,并实现。
在cmd。exe中生成ps.dll,并注册。
另外创建一个客户端工程(Dialog Exe),并创建一个ATL类实现第一个工程中的outgoing接口;按常规的处理方法创建对象,得到IConnectionPoint接口,都能成功,但是在Advise时出现错误,HRESULT = -2147220990
HRESULT hr = 0;
hr = ::CoCreateInstance(
CLSID_EastCOMServer,
NULL,CLSCTX_LOCAL_SERVER,
IID_IEastCOMServer, (LPVOID*)&pServer);
if(FAILED(hr))
{
AtlTrace("Get instance failed!\n");
return TRUE;
}
IConnectionPointContainer * pContainer = NULL;
hr = pServer->QueryInterface(
IID_IConnectionPointContainer,
(LPVOID*)&pContainer);
if(FAILED(hr))
{
AtlTrace("Get container failed!\n");
pServer->Release();
pServer = NULL;
return TRUE;
}
IConnectionPoint * pPoint = NULL;
hr = pContainer->FindConnectionPoint(
IID__IEastCOMServerEvents,
&pPoint);
if(FAILED(hr))
{
AtlTrace("Get container failed!\n");
pContainer->Release();
pContainer = NULL;
pServer->Release();
pServer = NULL;
return TRUE;
}
sinkCookie = 0;
// CComObject<EastCientSink> * pSink;
// CComObject<EastCientSink>::CreateInstance(&pSink);
IUnknown * pIUnk = NULL;
hr = _Module.GetClassObject(CLSID_EastCientSink, IID_IUnknown, (LPVOID*)&pIUnk);
if(FAILED(hr))
{
AtlTrace("Get container failed!\n");
pPoint->Release();
pPoint = NULL;
pContainer->Release();
pContainer = NULL;
pServer->Release();
pServer = NULL;
return TRUE;
}
/**
就是这个地方除了错。hr = -2147220990
*/
hr = pPoint->Advise(pIUnk, &sinkCookie);
if(FAILED(hr))
{
AtlTrace("Get container failed!\n");
pPoint->Release();
pPoint = NULL;
pContainer->Release();
pContainer = NULL;
pServer->Release();
pServer = NULL;
return TRUE;
}
pPoint->Release();
pPoint = NULL;
pContainer->Release();
pContainer = NULL;
请问,COM ConnectionPoint的外行接口是不是只能使用dual类型的接口,或者在客户端(使用Local_Server)实现了外行接口以后,还要作一些其他工作(比如需要手工完成的注册或生成dll等),在我的考虑中,这事需要的,因为外行接口也是一个夸进程的调用,可是他的ps在哪儿呢,是不是已经由Server端的ps一起生成,因为外行接口是在Server端的idl中定义的,可是为什么又连不同呢?请各位大虾赐教