Register for text width to be used with \l'..'?

[Oliver Corff]

Dear All,

if I want to draw a line spanning my whole text block using \l'nn', I
usually do it the quick and dirty way and use a number which produces a
visual fit, e.g. for an A4 page with default margin settings in ms I say
\l'46' (which is visibly a tiny bit too short but ok for my current
purpose).

Is there a way to feed the text width to \l directly? I studied the list
of predefined registers but there does not seem to be one.

Thanks a lot,

Oliver.

--
Dr. Oliver Corff
mailto:oliver.corff@email.de