Re: GetExtension not working

[User (Legacy)]

Good morning! 

I use the following code: 

// variable declaration 

IAnnListPtr pAnnList; 

_bstr_t annotation = "AnnotationX.AnnList"; 

// creation 

pAnnList.CreateInstance(__uuidof(AnnotationX)); 

HRESULT rs = chartfx->AddExtension((IUnknown *)pAnnList); 

// retrieval 

chartfx->raw_GetExtension(annotation, (IUnknown **) &pAnnList); 

Maybe it has something to do with calling the string in the actual 

getextension call.  Try _bstr_t. 

HTH 

-- 

josh 

"Andrew Pane" <apane@merak.com> wrote in message 

news:DE0379D14694D211B4CE00609770710D056040@sftfx-221.wamnet.net... 

> 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 

> --------------------------------------- 

> Merak Projects Ltd. 

> A Division of Schlumberger GeoQuest 

> --------------------------------------- 

>