Wouldn't it be easier if you just extract the drawing area from PDN instead of the whole program? I suppose you can draw on the mainform.cs and then you will need a few other classes with the pencil and stuff.
So you add the mainform.cs (and the other relations) to your program and you should have your drawing area or am I seeing this way too simple?
I'm asking because I'm making a LAN Pictionary and I also need a drawing area but I can't seem to find a solution.