The procedures in startup-hook are called with no arguments after scwm\n\ has processed the scwmrc and captured all application windows, and\n\ right before it enters the main event loop. Note that during\n\ processing of the .scwmrc startup file, windows have not already been\n\ captured, so the window-list (as reported by list-all-windows) is\n\ empty. To provide behviour conditioned on a property of an existing\n\ window, this hook should be used instead.