title: C# wpf question custom checkbox
body: <p>I just started getting deeper into C# and WPF design, so dont mind if I ask for some basics.</p>
  
  <p>I am trying to port one of our internet applications to a c# application and having some difficulties.</p>
  
  <p>I need 4 checkboxes which look like this. If you click them they should look like the second one. </p>
  
  <p><a href="http://frauneder.com/checkbox_example.jpg" rel="nofollow noreferrer">http://frauneder.com/checkbox_example.jpg</a></p>
  
  <p>I was able to do it with images which change on click but there I miss the ischecked property.</p>
  
  <p>The second question:
  I want to check/uncheck the checkboxes using the 1-4 keys on my keyboard. How do I do this?</p>
  
  <p>Thanx very much in advance!</p>