Try adding () to the arg declaration as below:

private sub ProcessArray(MyArray() as String)
  dim i%
  for i = 0 to UBound(MyArray)
    MyArray(i) = i
  next
end sub

>How would I pass an array into a function like any other data type?
>When I try:
>
>private sub ProcessArray(MyArray as Array)
> dim i%
> for i = 0 to UBound(MyArray)
> MyArray(i) = i
> next
>end sub
>
>I get an error because the compiler is expecting values after the keyword "Array".
>
>I tried this as a variant like:
>
>private sub ProcessArray(MyArray as variant)
> dim i%
> for i = 0 to UBound(MyArray)
> MyArray(i) = i
> next
>end sub
>
>But during runtime I error out on the UBound(MyArray) call because of an invalid type argument. It appears that when I pass the original array in which is an array of strings, the variant type in the function is assumed to be just a string value and not an array of strings.
>
>Can anyone help me please? Thanks.