Question

This may be too involved.
Considering:
In emacs in r-mode or lisp mode (etc) information can be sent directly (copied, pasted, evaluated) from one buffer to the the R or Lisp interpreter.

I typically configure an emacs session to have 3 windows – a large horizontal window on top and two windows beneath it. (How) could I configure, which keys/ commands might I use to send the kill-ring to the last cursor position of the top window / buffer?

The buffer / window will not always necessarily have the same contents/file. (How) could I name it upon initialization?
Similar to C-X, C-B or C-X, B how might I specify which of the three window positions to go to (based on position)?

Answer 1

See window-at. For example,

(defun yank-into-top-window (&optional arg)
  (interactive "*P")
  (with-selected-window (window-at 0 0)
    (yank arg)))