How do I use Text Histogram: Dictionary Object?

[Vbort44]

I am looking for some information on a closed string:
Dictionary Object
http://excelforum.com/showthread.php?t=628841&page=2

I would like to know what the "Scratch Area" is and if there is any way to make a list of words not to include.

I've attached the file for your reference as well.

Thanks!