Python为处理所有类型的异常提供了广泛的支持，但是出于这些示例程序的目的，我尽量保持其简单。
Python has extensive support for handling all types of exceptions but, for the purposes of these example programs, I've kept it simple.
挂钩例程需返回一个合适的值，以便处理能继续进行(HINSTANCE或FARPROC)，或者返回0指示将引发异常。
The hook routine needs to return a suitable value, so that processing can continue (an HINSTANCE or FARPROC) or 0 to indicate that an exception should be thrown.
挂钩例程需返回一个合适的值，以便处理能继续进行(HINSTANCE或FARPROC)，或返回0指示将引发异常。
The hook routine needs to return a suitable value so that processing can continue (an HINSTANCE or FARPROC) or 0 to indicate that an exception should be thrown.
挂钩例程需返回一个合适的值，以便处理能继续进行(HINSTANCE或FARPROC)，或返回0指示将引发异常。
The hook routine needs to return a suitable value so that processing can continue (an HINSTANCE or FARPROC) or 0 to indicate that an exception should be thrown.
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