See the question and my original answer on StackOverflow

The free online site (disclaimer: I wrote it) is a tool that will give you all values you want (it has around 400000 values/name pairs extracted from the whole Windows SDK and DDK, and also some Visual Studio headers), for example:

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It also works the other way around:

It will give you the computed value (you can also see the input source) and is especially useful for people who are not using C/C++.