IsBadReadPtr

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Why it generates an output in my Visual Studio? excepton, exception, ...

[Guest]

Debugger catches first-chance exceptions. From WinDbg help:

First Chance Exceptions
Each kind of exception (access violation, stack overflow, and so on) can be raised to a debugger as either a "first chance" or "second chance" exception. First chance exceptions are, by definition, non-fatal unless they are not handled properly with an error handler, at which point they are raised again as a second chance exception (which only a debugger can handle). If no debugger handles a second chance exception, the application is shut down.

Hope this helps