Re: C2259 : cannot instantiate abstract class

From:
"Alexander Grigoriev" <alegr@earthlink.net>
Newsgroups:
microsoft.public.vc.language
Date:
Tue, 9 Jan 2007 08:11:32 -0800
Message-ID:
<#19wUjANHHA.5104@TK2MSFTNGP06.phx.gbl>
OP also needs to implement AddRef, Release, QueryInterface methods of base
class IUnknown.

"Alex Blekhman" <xfkt@oohay.moc> wrote in message
news:%23QM0GS%23MHHA.3668@TK2MSFTNGP02.phx.gbl...

"Jacky" wrote:

DECLARE_INTERFACE(ID3DXAllocateHierarchy)
{
[...]
   STDMETHOD(CreateMeshContainer)(THIS_
       LPCSTR Name,
       CONST D3DXMESHDATA *pMeshData,
       CONST D3DXMATERIAL *pMaterials,
       CONST D3DXEFFECTINSTANCE *pEffectInstances,
       DWORD NumMaterials,
       CONST DWORD *pAdjacency,
       LPD3DXSKININFO pSkinInfo,
       LPD3DXMESHCONTAINER *ppNewMeshContainer) PURE;
[...]
};

class CAllocateHierarchy : public ID3DXAllocateHierarchy
{
public:

   STDMETHOD(CreateMeshContainer)(THIS_
       LPCSTR Name,
       LPD3DXMESHDATA pMeshData,
       LPD3DXMATERIAL pMaterials,
       LPD3DXEFFECTINSTANCE pEffects,
       DWORD NumMaterials,
       DWORD *pAdjacency,
       LPD3DXSKININFO pSkinInfo,
       LPD3DXMESHCONTAINER *ppNewMeshContainer)
   {
       [...]
   }
};


Declaration of `CAllocateHierarchy::CreateMeshContainer' method is quite
different from `ID3DXAllocateHierarchy::CreateMeshContainer'. That's why
you get C2259 error.

Alex

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