Yeah electricpetet
I dropped by here to let you know of conditional formatting and to cancel out my earlier post on where your vba should be. Palusa told you actually that you should write your code in that specific sheet and he is right.
I keep functions in modules but I think subroutines are more sensitive to where you store them because they deal with more cells and they produce an action effecting a range of cells, while functions simply return a value.
For this particular sub, reference is made to the sheet you will process. So first keep in mind the name of the sheet you are storing data(say sheet1), then switch to VB window, in the folder area there(usually on the left) double click the "sheet1" and the code window(usually on the left) should read "worksheet",paste the code or write it on there. Then switch to excel window and type in numbers some less than 1000 and some in excess, and there will be some action everytime you move to a different cell. I tried it and it worked(though I dont know what the theme is).
respects
ijr