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.NET Forum / Languages / Managed C++ / December 2004Debugger Error in VC++.NET
I am encountering a very strange error Openning a Visual C++/Win32 Console project with mfc support, writing a simple Sleep(5000) function in the main and running the app in Debug mode (default settings). while closing the app in the middle of execution (click on the close window button) i am getting the following error "Unhandled exception at 0x7c29ed41 (mfc71d.dll) in test2.exe: 0xC0000005: Access violation reading location 0xf78b78e8. This behavior occurs only in debug mode configuration We are encountering many problems in porting our code from VC6 to VC++.NET but we would like to solve this first.. Running Visual Studio.NET 7.1.3088, .NET Framework 1.1.4322 SP1, on Windows2000 Professional, SP thanks in advance, ziv > I am encountering a very strange error: > Openning a Visual C++/Win32 Console project with mfc support, writing a simple Sleep(5000) function in the main and running the app in Debug mode (default settings). while closing the app in the middle of execution (click on the close window button) i am getting the following error: > "Unhandled exception at 0x7c29ed41 (mfc71d.dll) in test2.exe: 0xC0000005: Access violation reading location 0xf78b78e8." > [quoted text clipped - 3 lines] > > Running Visual Studio.NET 7.1.3088, .NET Framework 1.1.4322 SP1, on Windows2000 Professional, SP4 When you click Close button, the default handler for the event calls ExitProcess, thus triggering MFC cleanup. The problem is that the system starts a new thread to call the handler, and therefore the cleanup is made on that thread, not on the main thread (which is killed by ExitProcess by that time). The solution is to register your own handler for Close, Ctrl-C and Ctrl-Break events (using SetConsoleCtrlHandler function), handle these events and ask your main thread to exit cleanly. Regards, Oleg Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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