Hi Arne,

>that can't work because S[CurrRow,20] will be *evaluated* - I'm trying to set the control source TO S[1,20] (in this case) as the variable reference not it's value.

Ahh, then put it in quotes controlsoure = 'S[1,20]'. Also, Ed pointed out scoping issues. I would make this a property on the form, to add an array prop (if you don't know) open the form in the form designer, from the Form menu choose Add Property. Then type it in like this: aS[1,20] This can now be dimensioned and is available at all times (while the form is running :-)