How to map the screen of a terminal without using the cursor library

[Shiping Zhang]

Happy New Year to everyone.
I want to know how to get the characters at different locations on the screen
of a terminal other than the control terminal. I want to control the screen
pattern of that terminal based on what is on the screen. Unfortunately the
cursor library seems only work on the control terminal. The routine initscr()
does not allow you to specify a terminal.  Thanks for any help.

-ping   ping at cubmol.bio.columbia.edu  (128.59.128.3)