Steve, i don't think that's possible. it would create a
circular reference. The best way to do it is to protect
the cells that have formulas in them.
Kevin M
-----Original Message-----
Can I conditionally format such that if some one
to "Data" the "Validation" then choose "input message".
You can write a message that will appear when the cell is
selected. It will not prevent the cell from being
overwritten though.