title: Compiler errors in WINNT.H after retargeting solution to latest SDK (10.0.18362)
body: <p>After retargeting my solution to SDK version 10.0 (latest installed version) (10.0.18362) and upgrading my projects to platform toolset v142, I am receving compile-time errors in <strong>winnt.h</strong> as follows:</p>
  
  <pre><code>...\Windows Kits\10\Include\10.0.18362.0\um\winnt.h(18611,19): error C2143: syntax error: missing ':' before 'constant'
  ...\Windows Kits\10\Include\10.0.18362.0\um\winnt.h(18611,22): error C2143: syntax error: missing ';' before ':'
  ...\Windows Kits\10\Include\10.0.18362.0\um\winnt.h(18611,22): error C2059: syntax error: ':'
  ...\Windows Kits\10\Include\10.0.18362.0\um\winnt.h(18612,29): error C2143: syntax error: missing '{' before ':'
  ...\Windows Kits\10\Include\10.0.18362.0\um\winnt.h(18612,29): error C2059: syntax error: ':'
  ...\Windows Kits\10\Include\10.0.18362.0\um\winnt.h(18613,9): error C2059: syntax error: '}'
  ...\Windows Kits\10\Include\10.0.18362.0\um\winnt.h(18614,5): error C2059: syntax error: '}'
  ...\Windows Kits\10\Include\10.0.18362.0\um\winnt.h(18615,1): error C2059: syntax error: '}'
  </code></pre>
  
  <p>This happens purely as a result of the upgrade. What might I have done wrong?</p>