>I put .f. for the field rule on that field in my table. After modifying that field from a browse window it would not let me leave the cell. I was stuck in the cell and had to close down foxpro from the desktop.

You're not supposed to modify field in the browse window. What is the exact goal you want to achieve? In any case, you were not able to change the field, so the field is essentially readonly - what you wanted.

However, if you want the field to be readonly in the browse window, it's much easier to make it so.