com组件调用代码示例----续

--Method 3--------------------------------------------------------

CoInitialize(NULL);

HRESULT hr;

CLSID clsid;

hr=CLSIDFromProgID(OLESTR("myCom.GetRes"),&clsid);

IGetRes* ptr;

IGetResEx* ptrEx;
//使用CoCreateClassObject创建一个组件(特别是mutilThreads)的多个对象的

时候，效率更高.

IClassFactory* p_classfactory;

hr=CoGetClassObject(clsid,CLSCTX_INPROC_SERVER,

NULL,IID_IClassFactory,

(LPVOID*)&p_classfactory);

p_classfactory->CreateInstance(NULL,__uuidof(IGetRes),

(LPVOID*)&ptr);

p_classfactory->CreateInstance(NULL,__uuidof(IGetResEx),

(LPVOID*)&ptrEx);

ptr->Hello();

ptrEx->HelloEx();

CoUninitialize();