Closing of an output window.
close_window closes a window which had been opened by open_window or by open_textwindow. Afterwards the output device resp. the window area are ready to accept new calls of open_window and of open_textwindow. The current output window is closed. If you want to close another window, you have to activate it by set_window.
If you want to perform other display output after the call of close_window you have to call once more a procedure to open a new window or the procedure set_window to activate another window.
close_all_windows(:::).
If one ouputwindow exists, then close_window returns TRUE. If necessary an exception is raised.
open_window, open_textwindow, set_window
open_window, open_textwindow, set_window