Chapter 16. WH_SYSMSGFILTER
The WH_SYSMSGFILTER hook is a close relative of
the WH_MSGFILTER hook, as I mentioned in Chapter 15. These hooks are very similar in appearance,
but as you will see, they each have their own peculiarities. In this
chapter I will compare and contrast these two hooks and present an
example using the WH_SYSMSGFILTER hook.
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