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Error when running VC++ app in debug mode

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Error when running VC++ app in debug mode

When I run my VC++ application in debug mode. I get the following error: "Unhandled exception in some xxx.exe (MFC42.dll): 0xC0000005: Access violation." Can you please help me?
This is because you are accessing invalid memory. Run the program under the debugger, and the debugger will stop where the crash occurs, so you can determine how to proceed with fixing the bug.

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