GDL Label for window/door header

[AngelWil]

I'm trying to make a label for a door/window header. I want to use a line to graphically represent the header in structural plans. Is there a way to get the line size to read the size of the window? That way if the window size changes in the future my header label will change with it. The header also needs to overhang the window so its graphically over the studs/posts. That part I have figured out. I've attached my GDL script, you can see I've been messing around with and will need to clean out all the ! when its done.