>>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.
>>...
>>

>
>The best you can do is this.
>Obviously it's no use.
>
>

>PRIVATE a
>a='test'
>=Testa(@a)
>=Testa(a)
>PUBLIC x
>=Testx(@x)
>=Testx(x)
>
>procedure Testa
>lparameter b
>MESSAGEBOX("variable b "+IIF(VARTYPE(m.a)=='U',"Reference to a","is a stand-alone variable"))
>
>procedure Testx
>lparameter b
>MESSAGEBOX("variable b "+IIF(VARTYPE(m.x)=='U',"Reference to x","is a stand-alone variable"))
>

Thanks, I've looked at a simular approach. The problem is that the callee would not know the name of the argument the caller is using.