title: MFC how to convert PNG with transparent attribute to HBITMAP
body: <p>I loaded <code>PNG</code> file using GDI+.</p>
  
  <p>My source use <code>HBITMAP</code> so I convert <code>PNG</code> to <code>HBITMAP</code>.</p>
  
  <p><code>PNG</code> file has a transparent background but <code>HBITMAP</code> has a background.</p>
  
  <p>I want to remove backround from <code>HBITMAP</code>.</p>