title: Mousewheel Delta value always 120
body: <p>I am creating an application in WPF that uses the mousewheel to zoom in/out an image. The amount of zooming is based on the amount of mouse wheel turning.</p>
  
  <p>The problem is that the Delta value is always 120, as explained in MSDN. So, even if I turn the wheel 1 notch or 5 notches it will always be 120. Do you know a way around this?</p>