Function: frame-old-selected-window
frame-old-selected-window is a function defined in window.c.
Signature
(frame-old-selected-window &optional FRAME)
Documentation
Return old selected window of FRAME.
FRAME must be a live frame and defaults to the selected one.
The return value is the window selected on FRAME the last time window change functions were run for FRAME.
Source Code
// Defined in /usr/src/emacs/src/window.c
{
if (NILP (frame))
frame = selected_frame;
CHECK_LIVE_FRAME (frame);
return XFRAME (frame)->old_selected_window;
}