How to draw diagram control?
<p>Is there any control to draw something like this?<img src="http://i.stack.imgur.com/6p2F7.png" alt="tree diagram, I think they name it SVN tree, I'm not sure"></p>

<p>some cells have only one parent, some other have more than one. some have one or more child. but there is no group of child that have a group of fathers.</p>
