form_field_new - create and destroy form fields


       #include <form.h>
       FIELD *new_field(int height, int width,
                        int toprow, int leftcol,
                        int offscreen, int nbuffers);
       FIELD *dup_field(FIELD *field, int toprow, int leftcol);
       FIELD *link_field(FIELD *field, int toprow, int leftcol);
       int free_field(FIELD *field);


       The  function new_field allocates a new field and initial-
       izes it from the parameters given: height, width,  row  of
       upper-left  corner,  column  of  upper-left corner, number
       off-screen rows, and number of additional working buffers.

       The  function  dup_field duplicates a field at a new loca-
       tion.  Most attributes (including current contents,  size,
       validation  type, buffer count, growth threshold, justifi-
       cation, foreground, background,  pad  character,  options,
       and  user pointer) are copied.  Field status and the field
       page bit are not copied.

       The function link_field acts like dup_field, but  the  new
       field  shares  buffers with its parent.  Attribute data is

       The function free_field  de-allocates  storage  associated
       with a field.


       The function, new_field, dup_field, link_field return NULL
       on error.

       The function free_field returns one of the following:

       E_OK The routine succeeded.

            System error occurred (see errno).

            Routine detected an incorrect or  out-of-range  argu-


       curses(3X), form(3X).


       The header file <form.h> automatically includes the header
       file <curses.h>.
       These routines emulate the System V forms  library.   They
       were not supported on Version 7 or BSD versions.

       It  may be unwise to count on the set of attributes copied
       by  dup_field(3X)  being  portable;  the  System  V  forms
       library  documents  are  not  very  explicit  on what gets
       copied and was not.


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