In reply to Dale Thompson.

Hi. Thanks for your comments. Adding comment statements has helped me understand code I wrote years ago. There is a "rule" that after a period of time (6 weeks?) that reading your own code is equivalent to reading someone else's code. It's a shame that so many of the posts showing good programming practices are re-formatted with proportional text (rather than mono-spaced) text. I suggest that you use a screen capture of a piece of code so that it doesn't get re-formatted.

Keep the comments coming.