Thank you. I have already looked at both the links. I found a code from http://www.rtapo.com/tutorials/tk_tree.html

Code: http://www.rtapo.com/downloads/tk_tree_ex_1.pl.txt

You can see that they are using a hash of hash to build a "job" structure and then display it graphically.

If only I could read a file with similar sturcture and display it?!