Problem:

In vc6, there is such a declaration in stdafx.h as:
extern CComModule _Module;

and in the main module:

CComModule _Module;

But when you complie it in vc8, the following errors apears:

c:\temp\myatl\stdafx.h(24) : error C2146: syntax error : missing ‘;’ before identifier ‘_Module’
c:\temp\myatl\stdafx.h(24) : error C4430: missing type specifier – int assumed. Note: C++ does not support default-int
c:\temp\myatl\stdafx.h(24) : error C4430: missing type specifier – int assumed. Note: C++ does not support default-int

Solution:

In ATL 7.0, which is the ATL version that is included in Visual C++ .NET and in Visual C++ 2005, the CAtlBaseModule class has replaced the obsolete CComModule class.

Microsoft has given the solution in KB309705 – “_AtlBaseModule.m_hInst replaces _Module.m_hInst in ATL 7.0″

http://support.microsoft.com/kb/309705/

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