title: How draw a shadow effect in a complete Bitmap image?
body: <p>I want know if is possible draw a shadow effect in a complete Bitmap image already existent and after have a effect similar to this example below, where all area behind modal Form is my new Bitmap image already with the shadow effect? =></p>
  
  <p><a href="https://i.stack.imgur.com/91AWk.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/91AWk.png" alt="enter image description here"></a></p>