If your worksheet is (password-) protected, your customers cannot unhide the
hidden columns.

(Unless they break the password, which is a treat)

HTH
--
AP

"Vegetable Dave" <Vegetable a écrit dans le
message de news: ...
I make a product list for my customers based on pricing I (like any
business)
receive from my vendors. In order to calculate the price I charge my
customers I first need to create a column for prices I pay my vendors and
then my customer prices are based on formulas and markups using the Vendor
price column figures.

I know I can hide this column - but how do I hide but more importantly
protect this column so when I email my customers this product list, they
are
unable to open this hiden column to see what I pay for my product? Again,
I
am not trying to find out how to simply hide a column as I already know
how
to do this.

Thanks!