You can create a parameter object in the calling program, and use CREATEOBJECT() to create the parameters with specific prefixes. In the receiving function use amembers() and FOR EACH to find the properties which have a specific prefix. If it isn't there, it wasn't passed

>Can anyone suggest a way to pass a variable number of parameters to a method or function where the maximum number is not known in advance?
>
>E.g. Foxpro pseudocode below:
>
>function calcAverage()
>local n,v,i
>n=pcount()
>for i=1 to n
> v=v+parameter(i)
>next
>return v/n
>
>avg=calcAverage(1,2,3,4,5,6,7)
>
>I know that you can declare a maximum number of parameters. But what if I dont know in advance? Should I declare 10 parameters and do the following
>
>function calcAverage(p1,p2,p3,p4,p5,p6,p7,p8,p9,p10)
>local n,v,i,sp
>n=pcount()
>v=0
>for i=1 to n
> sp='p'+ltrim(str(i,2))
> v=v+&sp
>next
>return v/n
>
>
>Costas