Книга: Microsoft Windows Embedded CE 6.0 Exam Preparation Kit

Hardware and Software Exceptions

Hardware and Software Exceptions

Windows Embedded CE uses the same structured exception handling (SEH) approach for all hardware and software exceptions. The central processing unit (CPU) can raise hardware exceptions in response to invalid instruction sequences, such as division by zero or an access violation caused by an attempt to access an invalid memory address. Drivers, system applications, and user applications, on the other hand, can raise software exceptions to invoke the operating system's SEH mechanisms by using the RaiseException function. For example, you can raise an exception if a required device is not accessible (such as a USB camera or a database connection), if the user specified an invalid command-line parameter, or for any other reason that requires you to run special instructions outside the normal code path. You can specify several parameters in the RaiseException function call to specify information that describes the exception. This specification can then be used in the filter expression of an exception handler.

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