Change the size of a control in lightswitch beta

Question

I'm playing around with my first lightswitch application and am trying to change the size of a list control. Does anyone know how to do that? I've tried:

this.FindControl("PersonList").SetProperty("Height", 200);

but get told the height property doesn't exist. I've had a quick look thorugh the lightswitch namespaces in the object browser but so far haven't found anything useful.