Introduction        Introduction to window functions
 WACLOSE()           Closes all active windows
 WBOARD()            Define screen window area
 WBOX()              Enclose a window
 WCENTER()           Center current window
 WCLOSE()            Close window
 WCOL()              Window left-hand column position
 WFORMAT()           Text margins in windows
 WMODE()             Window position in screen
 WMOVE()             Move window
 WOPEN()             Open a new window
 WROW()              Window positioning
 WSELECT()           Reactivate opened window
 WSETMOVE()          Move window on cursor keys
 WSTEP()             Window stepped move