form_userptr(3X)                                 form_userptr(3X)

NAME
       form_userptr - associate application data with a form item

SYNOPSIS
       #include <form.h>
       int set_form_userptr(FORM *form, void *userptr);
       void* form_userptr(const FORM *form);

DESCRIPTION
       Every form and every form item has a  field  that  can  be
       used to hold application-specific data (that is, the form-
       driver code leaves it alone).  These functions get and set
       the form user pointer field.

RETURN VALUE
       The  function  form_userptr  returns  NULL  on error.  The
       function set_form_userptr returns one of the following:

       E_OK The routine succeeded.

       E_SYSTEM_ERROR
            System error occurred (see errno).

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

NOTES
       The header file <form.h> automatically includes the header
       file <curses.h>.

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

       The user pointer should be a void pointer.  We leave it as
       a char pointer for SVr4 compatibility.

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

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