GetExtension not working

[User (Legacy)]

I can't get the GetExtension function to work. Can you tell me what I am 

doing wrong? 

Sample code: (Using VC++, DLL, Latest service pack) 

// Add the annotation extension 

IAnnListPtr pAnnList; 

pAnnList.CreateInstance(__uuidof(AnnotationX)); 

pChart->AddExtension((IUnknown*)pAnnList); 

// Now try getting it back. 

LPUNKNOWN pList; 

HRESULT HR = pChart->raw_GetExtension("AnnotateX.AnnList", &pList); 

HR now contains CO_E_CLASSSTRING ("Invalid class string.") I tried 

"AnnotationX.AnnList" as well, since I saw the other post in this newgroup, 

but I get the same HRESULT. What string should I be using? 

Andrew Pane 

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Merak Projects Ltd. 

A Division of Schlumberger GeoQuest 

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