How can I prevent the following code crashing my program? ::MessageBox(NULL, Lbefore, NULL, MB_OK);

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Asked: May 31, 20262026-05-31T21:09:18+00:00 2026-05-31T21:09:18+00:00

How can I prevent the following code crashing my program? ::MessageBox(NULL, Lbefore, NULL, MB_OK);

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How can I prevent the following code crashing my program?

::MessageBox(NULL, L"before", NULL, MB_OK);
void* x = ::calloc(1, -1);
::MessageBox(NULL, L"after", NULL, MB_OK);

When I run this code I get the “before” message box, then the program crashes with an “unhandled win32 exception” (the “after” message box never appears).

I know the args to calloc are making it crash by asking for way too much memory! What I want to know is how to prevent the crash so that I get control back and can handle the lack of memory some other way?

(Windows XP, Visual Studio 2005)