>I have two logical fields - SCHOOL and WORK. I want to simply prevent users for checking of both SCHOOL and WORK - only one can be checked off. I have tried several things with the WHEN event of the check boxes such as in the WHEN event of the SCHOOL field I put in "work = .f.". However this doesn't work and I am still able to check off both boxes.
>
>Thanks,
>
>Nancy

How about: (off the top of my head)

In Work checkbox:
in Click method:

if MyTable.School 
   nodefault
endif

Similar in school textbox