This pull request executed golden file tests, but it has not been updated in a while (20+ days). Test results from Gold expire after as many days, so this pull request will need to be updated with a fresh commit in order to get results from Gold.

The general code is fine. But I have questions about the design, because it is only able to play MB_OK, while Win32 supports 10 different sounds.

I would like to have a parameter of an enum to support all of them, but then comes the portability problem for other platforms.

Shall we name it "Win32Beep.play" for now, and support a parameter that is the literal value of the beep kind?

@dkwingsmt I was wondering the same thing. We do already use the SystemSound.alert value on other platforms (e.g. Android). This PR is consistent with how we model channel values in other parts of the embedders, so I think that sort of refactor is probably beyond the scope of this change.

I do think it's worth some thought how we might do this -- especially as I just spent a couple days on testing for similar code with regards to semantics to resolve flutter/flutter#101217.

I think we can investigate that separately from this change though.

Yeah I didn't realize it's implementing a feature that already exists in the Framework.