title: Disable tap event on transparent part of image in WP7/WP8
body: <p>I am using some transparent images in my Windows phone project.
  Let Say My Origanal Image Size is 400 x 100.</p>
  
  <p><img src="https://i.stack.imgur.com/Y2XT7.png" alt="Original Image"></p>
  
  <p>After slicing images into four different parts it looks like this. First arrow is active and rest part is transparent but the image size is same 400 x 100. And I do the same for all rest three arrows. I sliced them for active part and while rest part will be transparent and size will be 400 x 100. So when I place all 4 images in grid it will show like above image. </p>
  
  <p><img src="https://i.stack.imgur.com/fMitz.png" alt="Image After Slicing But Its Same in Width, One Part is active and other part is transparent"></p>
  
  <p>I want to get tap event of each image. Is there any way I can just get the tap event of active part mean which have some value mean color value not transparent area or inactive part of image. Mean once I click on First image it will give me event of that image. And when I tap on second image it will give me tap event of second image. But When I click on image it gives me only 1 tap event as its taking the full width and height and other images are also in same size. Please suggest any work around for that.</p>