Microsoft KB Archive/154527

= BUG: C2374 in OLECTLID.H When Rebuilding DBDAO3.DLL for VC 4.2 =

Article ID: 154527

Article Last Modified on 12/1/2003

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APPLIES TO

 The DAO SDK, when used with:  Microsoft Visual C++ 4.2 Professional Edition

 Microsoft Visual C++ 4.2 Enterprise Edition

 Microsoft Visual C++ 5.0 Learning Edition 

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This article was previously published under Q154527

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SYMPTOMS
When rebuilding the DAO SDK that ships with Visual C++ 4.2, you will receive numerous C2374 errors compiling the DBDAO.CPP file:

C:\MSDEV\INCLUDE\OLECTLID.H(17) : error C2374:

'<Interface>' : redefinition; multiple initialization

where <Interface> is a number of OLE interfaces defined within OLECTLID.H.

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CAUSE
The \MSDEV\DAOSDK\SRC\STDAFX.H file that ships with the DAO SDK is incorrect. When rebuilding the DAO SDK DLL's, DBDAO.CPP includes its own STDAFX.H, which also includes AFXDISP.H and OLECTLID.H. However, AFXDISP.H has already included OLECTLID.H, creating the redefinition.

NOTE: This issue only occurs when recompiling the DAO SDK, and not when using the DAO SDK in a separate application. DBDAO.CPP is the only file that would include \MSDEV\DAOSDK\SRC\STDAFX.H that has the multiple include in it.

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RESOLUTION
Edit the \MSDEV\DAOSDK\SRC\STDAFX.H file to remove the explicit reference to OLECTLID.H. The final version of the file should look like this: // stdafx.h : include file for standard system include files, // or project specific include files that are used frequently, but //     are changed infrequently //   #define INITGUID TRUE #include <afxdisp.h>       // MFC OLE automation classes #include <CGUID.H>

#define DLLEXPORT  __declspec( dllexport )

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STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this bug and will post new information here in the Microsoft Knowledge Base as it becomes available.

Keywords: kbbug KB154527

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