troff question

[M.R.Campbell]

I am looking for a troff macro definition which says from this 
point on the line draw a horizontal line to the right margin.

The idea is the macro will calculate the distance
from the current point on the line to the right margin 
and then pipe the distance to the line drawing function \l.

Of course, the distance to the right margin will 
constantly change.       

Regards,
Michael
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Mike Campbell  Sceard Systems, Inc. 544 South Pacific St. San Marcos, CA  92069
mrc at Sceard.COM         {hp-sdd,nosc,ucsd,uunet}!sceard!mrc      +1 619 471 0655