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Nov 28th, 2004

Visual C++ program compiles, but won't run

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I am working on a time card program in Visual C++ (FYI: I am VERY new to this, so, please, be gentle with me)

It compiles with 0 errors and 0 warnings, but when it executes I get an error message that the program needs to close. When I tried to go into Debug, it gave me "Unhandled exception in MFCTimeCard.exe:0XC0000005: Access Violation" I click on OK and it goes to this piece of code in the AfxWinMain()

if (!pThread->InitInstance())
{
if (pThread->m_pMainWnd != NULL)
{
TRACE0("Warning: Destroying non-NULL m_pMainWnd\n");
pThread->m_pMainWnd->DestroyWindow();
}
nReturnCode = pThread->ExitInstance();
goto InitFailure;
}
nReturnCode = pThread->Run();

Please let me know if anyone needs more info. BTW: I did not touch this particular bit when working. I did however add the InitInstance() in a source file.
THANKS!!!

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Reagan

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Nov 28th, 2004

Re: Visual C++ program compiles, but won't run

The real error will be in the InitInstance() method.

jwenting

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duckman

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Nov 28th, 2004

Re: Visual C++ program compiles, but won't run

That is kinda what I figured, but I've looked it over a dozen times Here is my code:

BOOL CTimeCardApp::InitInstance() {
CTimeCard time;
time.DoModal();
return FALSE;
}
Thanks!

Reagan

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Nov 29th, 2004

Re: Visual C++ program compiles, but won't run

Doesn't returning false signify failure? I dunno, I'm not an MFC guy. If that's not the problem, then time is crashing on init.

glSuccinct

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Nov 30th, 2004

Re: Visual C++ program compiles, but won't run

I think you're onto something.
Where is the CTimeCard initialised?
What is it anyway? If it's a reference to something else you're calling a method on an uninitialised object which will indeed cause an access violation.

jwenting

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duckman

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Dec 4th, 2004

Re: Visual C++ program compiles, but won't run

Got it! I forgot to put in the a line to instantiate the application object. Thanks for your help!!

Reagan

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