No because not all older versions have version(4) and would error. A simple workaround might be :

LOCAL lNot8plus
on error lNot8plus = .t.
set enginebehavior 70
on error
if lNot8plus
*...
endif

Cetin

>Hi All,
>i am using this code below for to use "set enginbehavior 70" command in my start.prg if myapp.exe compiled vfp8. it runs without error . is this true for detection ?
>
>TIA
>
>

>  lcversion=TRANSFORM(VERSION(4))
>	      lcSearch='8'
>	      lcStatus=ATC(lcSearch,lcVersion)
>		IF  lcStatus # 0
>			SET ENGINEBEHAVIOR 70 &&80 &&vfp7 compatibility
>	WAIT WINDOW "EngineBehavior 70 Using...." TIMEOUT 0.05
>	    ENDIF
>