This hook is invoked just before placing a new window.\n\ It comes after before-new-window-hook, but before after-new-window-hook. \n\ Its procedures are each called with a single argument, WIN, the new window.\n\ This hook may be removed later since it is mostly redundant with the other\n\ two hooks, despite being invoked at a slightly different time. \n\ \n\ See also before-new-window-hook and after-new-window-hook.