           menu_win  - make and break menu window and subwindow asso-
           ciations

## SYNOPSIS

           #include
           int set_menu_win(MENU *menu, WINDOW *win);
           WINDOW *menu_win(const MENU *menu);
           int set_menu_sub(MENU *menu, WINDOW *sub);
           WINDOW *menu_sub(const MENU *menu);
           int scale_menu(const MENU *menu, int *rows, int *columns);

## DESCRIPTION

           Every  menu has an associated pair of curses windows.  The
           menu window displays any title and border associated  with
           the  window;  the menu subwindow displays the items of the
           menu that are currently available for selection.

           The first four functions get and set those windows.  It is
           not necessary to set either window; by default, the driver
           code uses stdscr for both.

           In the set_ functions, window argument of NULL is  treated
           as  though  it  were  stsdcr.   A menu argument of NULL is
           treated as a request to change  the  system  default  menu
           window or subwindow.

           The  function scale_menu returns the minimum size required
           for the subwindow of menu.

## RETURN VALUE

           Routines that return pointers return NULL on error.   Rou-
           tines  that  return an integer return one of the following
           error codes:

           E_OK The routine succeeded.

           E_SYSTEM_ERROR
                System error occurred (see errno).

           E_BAD_ARGUMENT
                Routine detected an incorrect or  out-of-range  argu-
                ment.

           E_POSTED
                The menu has already been posted.

           E_NOT_CONNECTED
                No items are connected to the menu.

## SEE ALSO

           curses(3X), menu(3X).

           The header file  automatically includes the header
           file .

## PORTABILITY

           These routines emulate the System V  menu  library.   They
           were not supported on Version 7 or BSD versions.

## AUTHORS

           Juergen  Pfeifer.   Manual  pages  and  adaptation for new
           curses by Eric S. Raymond.