set_form_userptr, form_userptr - associate application data with a form item

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

       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.

set_form_userptr, form_userptr - associate application data with a form item

       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.

       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).

ncurses(3NCURSES), form(3FORM)

ncurses 6.5                                        2024-12-28                                     userptr(3FORM)

#include<form.h>intset_form_userptr(FORM*form,void*userptr);void*form_userptr(constFORM*form);