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COM out-of-proc error

P: 18
Hi all,
I'm not able to compile out-of-proc component. The error I'm getting is

Error 1 error C2259: 'CFile' : cannot instantiate abstract class

I have given implementation for all of the methods in CFile class, which is derived form interface IFile. The createInstance method of CFactory derived from IClassFactory is

HRESULT CFactory::CreateInstance(IUnknown *pUnknownOuter, REFIID riid, void **ppv)
if(pUnknownOuter != NULL)

CFile *pF = new CFile;
cout << "Component: CFactory::CreateInstance() " << pF << endl;

if(pF == NULL)

HRESULT hr = pF->QueryInterface(riid, ppv);
return hr;

Im not able to compile at the line CFile *pF = new CFile;

Mar 18 '07 #1
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