I have form with 2 text boxes and 2 list boxes. On the same form I have an option group. When I select the second option I want the 2 text boxes and 2 list boxes to grey out (Disable)

I have tried

IF thisform.option1.value=1 then
thisform.text1.enable=.F.
thisform.text2.enable=.F.
thisform.List1.enable=.F.
thisform.List2.enable=.F.
else
endif

Where would I put this syntax i.e. The form init event maybe

Thankyou