Looking at this PR:

https://github.com/twisted/twisted/pull/1446

I see that iocpsupport was moved to a separate package, in order

to make building wheels on Windows easier.

Before this patch, I was prototyping building binary wheels on Windows

of Twisted core, and I had it working.

It looks like this code has now moved to: https://github.com/twisted/twisted-iocpsupport

How will this patch change for people installing Twisted on Windows?

Twisted is still used by a lot of users on Windows, and the IOCP Reactor is

still used on this platform.

Craig