>Does anyone know of a way to determine if a variable has been passed to a function by reference or by value. This is a run-time question.
>For example:
>

>local a
>a='test'
>=Test(@a)
>=Test(a)
>
>procedure Text
>lparameter b
>*-- here, i would like to verify that the variable 'a' was passed to 'b' as by reference.
>...
>

Take a look at this
http://berezniker.com/content/pages/visual-foxpro/difference-between-function-and-procedure-statements