>Hi Mike,
>
>I think the reason we don't use logical .T.'s and .F.'s is because we can have N-NO, Y-YES and U-UNKNOWN in most of our Y/N fields. Otherwise, I would prefer T/F for sure.

So, why don't you use a Logical field that allows .NULL. values?

.NULL is unknown value. If you use a checkbox, a .NULL. value is displayed as a different color and checked. It's value can be entered with the mouse as checked or unchecked, and if you do Ctrl-0 when the field has focus, it resets it to .NULL.