hello.

I am working on a quote tool in excel. people go into the spread sheet -
make their selections and it will come up with a final cost.

at this stage my boss has to validate the quote. I need there to be some
part of the sheet that only he can access and maybe tick a box to say he has
validated the quote.

once he has done this if anybody changes anything in the spreadsheet it
should loose his validation.

any help is appreciated!