Check chapter 24 "A very few, not very special effects". it has a simple
example "exercise" of altering the ADVENT.INF example adventure's status
line... scetchy as the description is.
If you want to see the actual code that draws the default status line, to
see how it works (theoretically <G>) look in the PARSER.H file and search
for the DrawStatusLine function.
--- ...with love and a banana fish. <as544@torfree.net>