Try the windows-2022 image on Azure, add some debug prints.

.azure/ci-windows-job.yml

@@ -3,7 +3,7 @@ jobs:
   timeoutInMinutes: 90
   displayName: 'Windows CI'
   pool:
-    vmImage: 'windows-2019'
+    vmImage: 'windows-2022'
   strategy:
     matrix:
       Py37_x86:

build.py

@@ -804,6 +804,16 @@ def checkCompiler(quiet=False):
         if not quiet:
             msg(f"CL.exe: {CL}")
 
+            msg('include: ' + info.include)
+            msg('lib:     ' + info.lib)
+            msg('libpath: ' + info.libpath)
+
+            for d in info.include.split(os.pathsep):
+                p = pathlib.Path(d, 'tchar.h')
+                if p.exists():
+                    msg('tchar.h: ' + str(p))
+                    break
+
 
     # NOTE: SIP is now generating code with scoped-enums. Older linux
     # platforms like what we're using for builds, and also TravisCI for