I'd actually use @ReturnVal1, @ReturnVal2 instead of sending the names as strings.

>May sound old-fashioned, but you can always pass parameters into a form by reference in a bit of a quirky way:
>
>given that ReturnVal1 and ReturnVal2 are to be given some value within the form's logic:
>
>Do form myForm with "ReturnVal1", "ReturnVal2"
>