form_field_userptr(3X) manual page
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form_field_userptr - associate application
data with a form field
#include <form.h>
int set_field_userptr(FIELD *field, void*userptr);
void *field_userptr(const FIELD *field);
Every form field 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 that field.
The function field_userptr returns a pointer
(which may be NULL). It does not set errno.
The function set_field_userptr
returns E_OK (success).
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.
The user pointer is a void pointer. We chose not to leave
it as a char pointer for SVr4 compatibility.
Juergen Pfeifer. Manual
pages and adaptation for new curses by Eric S. Raymond.
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