Re: Can't instantiate abstract class

From:
"Igor Tandetnik" <itandetnik@mvps.org>
Newsgroups:
microsoft.public.vc.language
Date:
Sun, 4 Oct 2009 09:58:54 -0400
Message-ID:
<#fK4QrPRKHA.220@TK2MSFTNGP02.phx.gbl>
Jack wrote:

//------------------------------------------------------------------------
   STDMETHOD(CreateFrame)(THIS_ LPCSTR Name,
                           LPD3DXFRAME *ppNewFrame) PURE;

//------------------------------------------------------------------------
virtual HRESULT __stdcall CreateFrame(LPCTSTR Name, LPD3DXFRAME
*ppNewFrame);


Name parameter is of type LPCSTR in the interface, but LPCTSTR in your
implementation. My guess is, you are building a Unicode build, where
LPCTSTR != LPCSTR.

Error 1 error C2259: 'CAllocateHierarchy' : cannot instantiate
abstract class c:\documents and
settings\garfield\project1\project_sim\project_sim\project_simview.cpp
78 Project_Sim


A little further down that error message, the compiler tells you which
methods are left unimplemented. Too bad you chose to omit that part.
--
With best wishes,
    Igor Tandetnik

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