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form_userptr 3x 2024-12-28 ncurses 6.5 Library calls

form_userptr(3x)                 Library calls                form_userptr(3x)

NAME

       set_form_userptr, 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 a pointer (which may be NULL).  It
       does not set errno.

       The function set_form_userptr returns E_OK (success).

PORTABILITY

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

       The user pointer is a void pointer.  We chose not to leave it as a char
       pointer for SVr4 compatibility.

AUTHORS

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

SEE ALSO

       curses(3x), form(3x)

ncurses 6.5                       2024-12-28                  form_userptr(3x)