title: Visual Studio disable warnings for files in specific directories
body: <p>We have a VS 2019 project which includes external source libraries which we add to our project. For instance we are using WTL (Windows Template Library). During compile time, these libraries produce huge numbers of warnings (particularly for members which do not have default values).</p>
  <p>For those files, we would like to completely disable warnings, or at least specify which warnings should be excluded for certain directories, because</p>
  <ol>
  <li>We are not going to change that code</li>
  <li>There are so many warnings, that we can easily miss some from our own code that we should resolve</li>
  </ol>
  <p>I saw a post about some flags that you should be able to pass to disable warnings for &quot;external&quot; files, but I do not see any options in the project settings.</p>