diagrams \ flow charts

Is there a standard way to diagram an OOP?
If so could you provide a link too?

There's really no standard way to do it. There are many options out there.
One of them is UML.
Here's a couple of links. You can probably search for better ones though.

http://www.cs.utah.edu/~cs3500/UML/3...ceDiagrams.pdf

http://www.andrew.cmu.edu/course/90-754/umlucdfaq.html

Thanks for the reply I'll look in depth at these later!