client with cogetclassobject.cpp

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// client.cpp
#include <iostream.h>
#include "Component with registration\component.h" // Generated by MIDL

// {10000002-0000-0000-0000-000000000001}
const CLSID CLSID_InsideCOM = {0x10000002,0x0000,0x0000,{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01}};

void main()
{
	cout << "Client: Calling CoInitialize()" << endl;
	HRESULT hr = CoInitialize(NULL);
	if(FAILED(hr))
		cout << "CoInitialize failed" << endl;
	
	IUnknown* pUnknown;
	ISum* pSum;

//	cout << "Client: Calling CoCreateInstance()" << endl;
//	hr = CoCreateInstance(CLSID_InsideCOM, NULL, CLSCTX_INPROC_SERVER, IID_IUnknown, (void**)&pUnknown);
//	if(FAILED(hr))
//		cout << "CoCreateInstance failed" << endl;

	IClassFactory* pClassFactory;
	hr = CoGetClassObject(CLSID_InsideCOM, CLSCTX_INPROC_SERVER, NULL, IID_IClassFactory, (void**)&pClassFactory);
	if(FAILED(hr))
		cout << "CoGetClassObject failed" << endl;

	pClassFactory->CreateInstance(NULL, IID_IUnknown, (void**)&pUnknown);
	pClassFactory->Release();

	cout << "Client: Calling QueryInterface() for ISum on " << pUnknown << endl;
	hr = pUnknown->QueryInterface(IID_ISum, (void**)&pSum);
	if(FAILED(hr))
		cout << "IID_ISum not supported" << endl;

	hr = pUnknown->Release();
	cout << "Client: Calling pUnknown->Release() reference count = " << hr << endl;

	int sum;
	hr = pSum->Sum(2, 3, &sum);
	if(SUCCEEDED(hr))
		cout << "Client: Calling Sum(2, 3) = " << sum << endl;

	hr = pSum->Release();
	cout << "Client: Calling pSum->Release() reference count = " << hr << endl;

	cout << "Client: Calling CoUninitialize()" << endl;
	CoUninitialize();
}