title: How to put image "placemarkers" inside a scrollbar in WPF?
body: <p>I have a long Scroll Viewer and I want to mark important spots with small images on the scroll bar. If the the image is clicked the scroll bar will jump to the corresponding content.</p>
  
  <p>I've seen this functionality in a few applications such as Eclipse and <a href="http://www.usabilitypost.com/2008/09/19/using-the-scrollbar-to-display-information/" rel="noreferrer">Chrome</a> and was wondering how to reproduce it with WPF.</p>