title: Boolean Family Variables in Revit and how to use them
body: <p>I'm trying to do something that has ended up giving me far more trouble than I thought it would; mainly because of my unfamiliarity with Revit.  Initially I was trying to use an algorithm to search through the users drawing, find valves, check if they were open or shut, and then draw a halo/ring around them.  Then I was told to do it through the families.  So, I opened Revit, created my rings, and now I'm at the point where I'm trying to apply them, but again: Unfamiliar.  I'm right here:</p>
  
  <p><a href="https://i.stack.imgur.com/wnL6B.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wnL6B.png" alt="enter image description here"></a></p>
  
  <p>The Valve Shut property is Shared.  I want to implement the Valve Status based on whether the Valve Shut is true/false.  It gives me a bunch of different error while I'm trying to do this because there's no documentation (I've found) on how to do this.  Does anyone know?  Help me Obi Wan Kenobi!!  You're my only hope (of closing this task)!</p>