Hi!


> Yup, that's it exactly!
>

Great!


> Now I just need to work out how to turn the values I get into columns
> that I can scroll the screen to.
>
> Is there a function that returns the width of the longest visible
> line, or the width of the buffer with truncated lines? I can't find
> anything like that.
>

I don't know of any such function either. However, I noticed that the
scroll bar change length depending on the content of the window. So,
presumably, you get all relevant information when
`ns_set_horizontal_scroll_bar' is called.

    -- Anders