"Highlight" current month in 12 month line chart

Giganews Newsgroups
Subject: "Highlight" current month in 12 month line chart
Posted by:  Thomas
Date: Mon, 16 Mar 2009

Hi all,

My manager saw a presentation from one of our vendors where they had a line
chart, showing forecast dates over a year. What impressed him was that they
had a black line going from the horizontal axis up to the top of the chart,
"highlighting" the month we are currently in.  I'm assuming this line moved
automatically as the year progressed. Is this something that's easy to do?
I've looked around but haven't found anything.