Debugging Visual C++ Windows by Keith Bugg

By Keith Bugg

Comprehend and regulate the trojan horse cycle! This unique laptop reference, offers educational dependent examples on the way to debug home windows purposes built with visible C++. you'll get a conceptual version for fighting and taking away insects throughout the layout cycle that incorporates feedback on id, prevention and correction for every of the 4 varieties of insects: * collect time insects * run time error * good judgment and layout error * laptop mistakes Debugging visible C++ home windows examines the various components that obliquely impact debugging. It features a assessment of reliable undertaking making plans and administration options, trying out plans, and identified compiler insects. you are going to learn the way compiler instruments equivalent to hint, secret agent, and tension paintings. and you'll notice how one can video display reminiscence operations on your software because it executes - whereas viewing the implications 'real time' on your debug window! additionally incorporated is a serious assessment of the debugging instruments that send with visible C++, in addition to, advertisement debuggers comparable to BoundsChecker and CodeWizard. tips about debugging database purposes also are supplied (appendices are supplied on ODBC mistakes codes and SQL country values). The significant other disk comprises workspace/projects demonstrating reminiscence kingdom checking, mistakes message retrieval, compiler insects, and the way to exploit the #pragma compiler directive, ASSERT and hint.

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CPP can be caused by closing, or destroying, a window before a message pump has been activated. Check your InitInstance() function. style & WS_CHILD); is generated because the WS_CHILD style was omitted. For non-child windows, use the CFrameWnd classes instead of CWnd. CPP as a result of failing to draw a bitmapped command button before its bitmap image is loaded. For dialog boxes, this is easily handled in the OnInitDialog() function, as in this example. AutoLoad(IDHELPBUTTON, this); CDialog::OnInitDialog(); // // rest of function follows .

Nevertheless, the developer must take a proactive role in the use of memory, since this is generally the primary culprit when bugs rear their ugly heads in your code in the form of exceptions and violations. In the upcoming chapters, we'll be looking at how you can resolve these problems. < previous page page_36 next page > < previous page page_37 next page > Page 37 Chapter 3 The Visual C++ Debugging Environment Beginning with this chapter, we start getting down to the nitty-gritty of debugging.

With the 32-bit version, each process gets its own 32-bit address space of virtual memory. With 232 memory < previous page page_17 next page > < previous page page_18 next page > Page 18 locations, that works out to about 4Gb, which is highly impractical for even midrange and mainframe computers, let alone the humble PC. To achieve utilization of this address space, the computer's hard drive is used as if it were part of the memory. Free space is divided into pages, and parts of the program are swapped out between the actual physical memory and the disk for each process.

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