title: Show Transparent Loading Spinner above other Controls
body: <p>I am working in a spinner control. I want the control to support transparent backcolor. When the arc is drawn, there is a blank space in the middle, I want that space to be truly transparent, so that I could put another control behind it and it would not be covered by the spinner.</p>
  
  <p>I tried overriding the CreateParams void.<br>
  Also I set the style to support TransparentColor.<br>
  Tried overriding OnPaintBackground void, but I cannot achieve the real transparent backcolor.</p>
  
  <p>So, what can you suggest me to do?</p>