I am expecting the user to select 1 or more not necessarily contiguous cells
and then operate on those cells. But first, I want to check that all selected
cells are within a specified cell range, say, $a$11:$a$200. Two questions:

1) how do I loop thru the user selected cells?

2) is there a way to do that range check mentioned above without looping
thru the selected cells?

Thanks a lot.