Function: window-header-line-height
window-header-line-height is a function defined in window.c.
Signature
(window-header-line-height &optional WINDOW)
Documentation
Return the height in pixels of WINDOW's header-line.
WINDOW must be a live window and defaults to the selected one.
Probably introduced at or before Emacs version 24.4.
Source Code
// Defined in /usr/src/emacs/src/window.c
{
return make_fixnum (WINDOW_HEADER_LINE_HEIGHT (decode_live_window (window)));
}