UDF UDS Parameter Limit

 Keywords: User Defined Function Subroutine Input Parameter Limit Limitation 16 UDF UDS Syntax Error

Question:

I am getting a syntax error if I use more then 16 input paramteters to a user defined function, is this the limit? Is there a work around?

Answer:

Yes that is the limit. Have you considered passing in a single array that contains all of your parameters?

Basically, instead of doing:

; Doesn't work - 17 parameters
#DefineFunction udfFoo(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q)
#EndFunction

You do:

#DefineFunction udfFoo(arrA)
#EndFunction

And then call it something like this:

arrA = ArrDimension(17)
For I = 0 To 16
   arrA[I] = Something...
Next
udfFoo(arrA)

Note that arrays are "magic" in two ways, as function parameters. First, as above, they can be used to send arbitrary length data. Second, they are "call by reference" - changes made in the function are passed back to the caller's array. This can be a way to get around the variable scoping rules that WinBatch imposes on functions, as well as providing a way to return multiple values (i.e., besides the main function return value).

Article ID:   W18337

Filename:   UDF UDS Parameter Limit.txt

File Created: 2011:09:29:08:21:34

Last Updated: 2011:09:29:08:21:34

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