>If the reason for knowing the name of the input variable is so that you can change the variable, then it is not necessary, you can simply pass the variable by reference :-
>
>lnValue = 0
>TestProc( lnValue) && by default, passed by reference
>? lnValue && Should print 999
>
>FUNCTION TestProc
>LPARAMETERS tnParam1
>tnParam1 = 999
>RETURN
>
>Regards
>Mark.
>
>p.s. Sorry if you already know this.
Mark,
Did I miss something. In your example parm would pass by value by default.

lnValue = 0
TestProc( lnValue)     && by default, passed by <b>value</b>
? lnValue  && Should print 999 (0 I expect)
TestProc(@lnValue)     && passed by reference
? lnValue  && Should print 999
do testproc with lnValue && passed by reference by default
? lnValue  && Should print 999


FUNCTION TestProc
LPARAMETERS tnParam1
tnParam1 = 999
RETURN

Cetin