title: Prevent window from being captured
body: <p>I'm solving this problem so long an i can't find solution.
  I would like to capture a screen but i want to exclude a specific window.
  Like capture whole screen but remove an window from it.</p>
  
  <p>Or what i have to set to notepad like styles or something to being captured ?</p>
  
  <p>Thanks</p>