title: How do I detect "one scaling level for all displays"?
body: <p>Windows 8.1 introduced this ridiculous <strike>bug</strike> feature where it automatically decides the DPI scaling for the user on a per-screen basis. I am instructing users to turn this feature off, by clicking the checkbox in the Control Panel for "Let me choose one scaling level for all displays". This 1:22 minute video shows where the setting is:
  <a href="https://www.youtube.com/watch?v=sE3IUTPy1WA" rel="nofollow">https://www.youtube.com/watch?v=sE3IUTPy1WA</a></p>
  
  <p>Anyway, my question is, how can I programmatically determine whether this setting is turned on or off? Is there a Win API call that I can make, or a registry setting that I can query? If this setting is turned off, I want to be able to detect that inside my application.</p>