title: tree visualization with libgraphviz / dot
body: <p>does anyone have some experience with libgraphviz using the standard c library?</p>
  
  <p>For my current project i would like to write a simple tool which visualize one of my abstract syntax tree in a jpg image or maybe even on a small X11 window. Graphviz itself provides
  seven, different libraries i could use and link to my application:</p>
  
  <ul>
  <li>cdt</li>
  <li>cgraph</li>
  <li>gvc</li>
  <li>pack</li>
  <li>pathplan</li>
  <li>xdot</li>
  </ul>
  
  <p>Unfortanetly, i have no idea which library is necessary for my task. I also don't need to translate my tree representation to the dot language and would like write it directly to an image. (Of course, it Would be also great using an API that abstracts the transformation to the dot language). </p>
  
  <p>Thanks for each advice :)</p>