title: transparent button on picture box in c#
body: <p>I would like to put many transparent button on picture box.<br>
  I am able to do this programically but all button are with solid background color.<br>
  Is it possible to make button components with transparent background and display them over picture box?<br>
  I want to do this using button because I have to have events belong to buttons.</p>
  
  <p>I saw this post <a href="https://stackoverflow.com/questions/9387267/transparent-control-over-picturebox">Transparent control over PictureBox</a> but I cannot make it work with buttons.</p>