Function: window-start
window-start is a function defined in window.c.
Signature
(window-start &optional WINDOW)
Documentation
Return position at which display currently starts in WINDOW.
WINDOW must be a live window and defaults to the selected one.
This is updated by redisplay or by calling set-window-start.
Probably introduced at or before Emacs version 1.1.
Source Code
// Defined in /usr/src/emacs/src/window.c
{
return Fmarker_position (decode_live_window (window)->start);
}