About Structured Exception Handling - Win32 Programmer's Reference

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About Structured Exception Handling

Structured exception handling gives developers complete control over the handling of exceptions, provides support for debuggers, and is usable across all programming languages and machines.

The Win32 API also supports termination handling, which enables developers to ensure that whenever a guarded body of code is executed, a specified block of termination code is also executed. The termination code is executed regardless of how the flow of control leaves the guarded body. For example, a termination handler can guarantee that clean-up tasks are performed even if an exception or some other error occurs while the guarded body of code is being executed.

Structured exception and termination handling is an integral part of the Win32 API; it enables a robust implementation of the system software. Developers can use these mechanisms to create consistently robust and reliable applications.

Structured exception handling is made available to developers primarily through compiler support. For example, the Microsoft compilers provided with the Win32 software development kit support the try keyword that identifies a guarded body of code, and the except and finally keywords that identify an exception handler and a termination handler, respectively. Although this topic uses examples from the support available in Microsoft compilers, other compiler vendors can provide this support as well.

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