C / C++ / MFC

{

    class A { };
    class B : public A { };
    class C : public A { };

    class BDerived: public B { };
    class CDerived: public C { };

    std::map<A*> m;

    ...


    A* pA = m[ key1 ];
    B* pB = dynamic_cast<B *>( pA );  // failed pointer cast returns NULL
    C* pC = dynamic_cast<C *>( pA );

    if ( pB )
    {
        //is a pointer to B or B derived
        ...
    }
    else if ( pC )
    {
        //is a pointer to C or C derived
        ...
    }
    else
    {
        //is not a pointer to B, C or B, C derived
        ...
    }
}

This has drawbacks.
- The CRT code is including more than once. Increasing the memory footprint of your application.
- Sharing the MFC in a DLL reduces the overall consumption of memory in the system
- MFC Extension DLL's are no longer supported.
- Allocating memory in one module (DLL,EXE) and freeing memory in another will cause a crash.
- Information like the locale are used in each module and are not shared. setlocale in the exe will not affect the locale in the DLL (this is good and bad depending on the design of the modules)
- There I heard rumors that there is a discussion to stop any support of statically linked version of CRT, MFC and ATL.

Avi Berger wrote:

Have you gotten a list of all the programs that he has installed on each machine? Any programs on both that are not common? Or perhaps common, but dubious?

Avi Berger wrote:

Is he close enough geographically that you could bring over a machine and put together a remote debugging setup?

Avi Berger wrote:

One thing that I find surprising is that you are able to use the same source code under both VC++ 6 and 2008, considering the non-standard dialect of C++ used in version 6 and not in later versions.

LoadStdProfileSettings(4);

CWinApp::LoadStdProfileSettings

Call this member function from within the InitInstance member function to enable and load the list of most recently used (MRU) files and last preview state.

void LoadStdProfileSettings(
   UINT nMaxMRU = _AFX_MRU_COUNT 
);