title: Convert hDC to 4bpp bitmap
body: <p>I am working on an application that does some GDI+ drawing to an HBITMAP selected in an HDC. After drawing is complete, I need to:</p>
  
  <ol>
  <li>Get a bitmap from the hDC</li>
  <li>Convert that bitmap to 4bpp bitmap</li>
  <li>Send the raw bits of the 4bpp bitmap to some other method.</li>
  </ol>
  
  <p>I am really lost, and I am really new to GDI+ and handles. Can anyone help me out?</p>