Mark
You cannot hide individual cells.
Rows and columns, yes.
Then protect the sheet with a password, which is very easy to crack.
You can hide the contents of cells and what is seen in the Formula Bar.
To hide cell contents, custom format to ;;;
To hide formula bar contents, format to "locked" and "hidden" then protect
the sheet with the easily-cracked password.
Gord Dibben MS Excel MVP