'Twas brillig, and the slithy toves did gyre and gimble in the wabe

CamelHump? Not heard that term before. But yes, some of the WSA* and mixed-case functions are very nice.

BTW, you can feed socket handles to the Win32 ReadFile* and WriteFile* functions. Come to think of it, there's not much in the way of I/O handles that you can't feed to those. Shame you can't use CreateFile to create and open sockets.

Anyway, I didn't know you were making a puzzle. I shall have to give it a go once it appears, as the last one was very good.