title: How to customise a HSlider in flex?
body: <p>I'm new to flex,and I want to change the image of HSlider,like this</p>
  
  <p><img src="https://i.stack.imgur.com/q7T20.png" alt="enter image description here"></p>
  
  <p>What should I do?please give me a simple example.</p>