window-new-pixel

window-new-pixel is a built-in function in `C source code'.

(window-new-pixel &optional WINDOW)

Return new pixel size of window WINDOW.
WINDOW must be a valid window and defaults to the selected one.

The new pixel size of WINDOW is the value set by the last call of
`set-window-new-pixel' for WINDOW. If it is valid, it will be shortly
installed as WINDOW's pixel height (see `window-pixel-height') or pixel
width (see `window-pixel-width').