[Python-Dev] How to decipher Windows errors on builds?

Hi, I'm getting build errors on Windows for https://github.com/python/cpython/pull/28386 The error message is: C:\Program Files (x86)\Windows Kits\10\Include\10.0.22000.0\um\winnt.h(253): error RC2188: D:\a\cpython\cpython\PCbuild\obj\311win32_Release\pythoncore\RCa01688(47) : fatal error RC1116: RC terminating after preprocessor errors [D:\a\cpython\cpython\PCbuild\pythoncore.vcxproj] Can anyone translate that into English for me? It suggests that there are errors in the preprocessor. But how do I tell what the error is? Cheers, Mark.