close_window — Close an output window.
close_window( : : WindowHandle : )
close_window closes a window which have been opened by open_window or by open_textwindow. Afterwards the output device or the window area, respectively, is ready to accept new calls of open_window or open_textwindow.
If the output window is valid close_window returns 2 (H_MSG_TRUE). If necessary an exception is raised.