How to maximize Emacs on Windows at startup?

Question

This is driving me crazy: I simply want Emacs to maximize to whatever screen resolution I have at startup. Ideally I like a cross-platform (Windows & Linux) solution tha

Answer 1

On X.org the system call is (since you asked originally for a cross-platform solution):

(defun x11-maximize-frame ()
  "Maximize the current frame (to full screen)"
  (interactive)
  (x-send-client-message nil 0 nil "_NET_WM_STATE" 32 '(2 "_NET_WM_STATE_MAXIMIZED_HORZ" 0))
  (x-send-client-message nil 0 nil "_NET_WM_STATE" 32 '(2 "_NET_WM_STATE_MAXIMIZED_VERT" 0)))