VFP 6.0

I have the VFP settings in Options...
-Locking and buffering
-Multiple record locks
-Buffering: Record (Optimistic)

I believe I did set that, and then this morning, I checked it and it was changed? Anyway, I clicked 'Set as Default'.

Now, I like to know what is the best way to take advantage of the optimistic record buffering? This is what I have coded in the 'Add' button (Click Event):

SELECT person
LOCATE FOR DELETED()
IF NOT EOF()
REPLACE id WITH ''
RECALL
SCATTER
ELSE
APPEND BLANK IN person
ENDIF
ThisForm.REFRESH

and this isn't correct, but this is how far I got. I want to be able to have the user input the data on the form (with a grid) and then click 'Save' (then save the record) or 'Delete' (clear the form or actually delete a record). FWIW, this is what I have in the 'Delete' button (Click Event):

nAnswer = MessageBox('Do you want to delete this record?',4)
IF nAnswer = 6
DELETE
SKIP -1
IF BOF()
LOCATE
ELSE
SKIP
IF EOF()
SKIP -1
ENDIF
ENDIF
ENDIF
ThisForm.REFRESH

and I have not gotten the 'Edit' button yet (and the whole form is still enabled, as of now)... One thing I must inform now is that there is a Primary key in the table, so it must be uniqueness (otherwise error violation)...

Chuck