[Closed] pixel width of text in UI

Hi all,
Im coding a UI which is completely generated procedurally via a text file. The on issue im coming up with is trying to get the buttons to line up as they vary thir width with what text is on them. I was looking at something like this:

(dotNetClass "System.Drawing.Graphics").measurestring "Hello" (dotNetObject "System.Drawing.Font" "Times New Roman" 12)

But was getting
– Runtime error: dotNet runtime exception: Non-static method requires a target.

any ideas?