Learn C++ from C

Quote:

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Originally Posted by RipRage

Hi Paul,

Thank you for your post. If its not to much trouble could you show me a working example ? the reason why i ask is because i am making a function fail deliberately like WSACleanup() in the destructor but i am unable to catch the exception...

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What type of exception is it? Is it a bona-fide C++ exception, where a C++ module actually throws an exception, or is it a Windows SE exception (Access violation, or some OS exception)?

If it's the latter, then you could try the catch-all:

Code:

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try
{
}
catch(...)
{
}

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But you should really fix the problem with your app if it's an OS exception.

I know that no socket functions throws exceptions explicitly, since they are all 'C' functions. The only exceptions possible are the ones generated by the OS (called Structured Exceptions). There is no guarantee, unless you set the proper compile switches, that these are caught (don't remember what these settings are). But at some point, you have to address these exceptions, and they are an indication that your program is faulty.

Regards,

Paul McKenzie

Hi Paul,

Not to worry, i am getting my bearings with MFC now and just trying to experiment with its classes via command shell instead of GUI.

I have ran into a problem and cannot seem to initialize MFC.

Code:

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#include <afxwin.h>

int main(void)
        {
        if(AfxWinInit(GetModuleHandle(NULL),NULL,GetCommandLine(),0)==FALSE)
                {  cout<<"Unable to initialize MFC"<<endl; return 1; }

        /*
        Use MFC Classes Here !!!
        */
       
        return 0;
        }

---

but i am getting this exception before main is called and dont i know why

Code:

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if (FLS_SETVALUE(__flsindex, (LPVOID)ptd) ) {

                /*
                * Initialize of per-thread data
                */

                _initptd(ptd,NULL);

                ptd->_tid = GetCurrentThreadId();
                ptd->_thandle = (uintptr_t)(-1);
            }
            else {

                /*
                * Return NULL to indicate failure
                */

                _free_crt(ptd);
                ptd = NULL;
            }
        }
    }

    SetLastError(TL_LastError);

    return(ptd);
}

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Can anyone help with this ?

EDIT: Debug window displays this: Warning: m_pMainWnd is NULL in CWinApp::Run - quitting application.

Ah my fault!, forgot to add "Use MFC in a shared DLL" in the project settings. All fixed now!