.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.br
.SH DESCRIPTION
These functions make it possible to set hook functions to be called at various
points in the automatic processing of input event codes by \fBform_driver\fR.
.br
.SH DESCRIPTION
These functions make it possible to set hook functions to be called at various
points in the automatic processing of input event codes by \fBform_driver\fR.
The function \fBset_field_init\fR sets a hook to be called at form-post time
and each time the selected field changes (after the change). \fBfield_init\fR
returns the current field init hook, if any (\fBNULL\fR if there is no such
hook).
The function \fBset_field_init\fR sets a hook to be called at form-post time
and each time the selected field changes (after the change). \fBfield_init\fR
returns the current field init hook, if any (\fBNULL\fR if there is no such
hook).
The function \fBset_field_term\fR sets a hook to be called at form-unpost time
and each time the selected field changes (before the change). \fBfield_term\fR
returns the current field term hook, if any (\fBNULL\fR if there is no such
hook).
The function \fBset_field_term\fR sets a hook to be called at form-unpost time
and each time the selected field changes (before the change). \fBfield_term\fR
returns the current field term hook, if any (\fBNULL\fR if there is no such
hook).
The function \fBset_form_init\fR sets a hook to be called at form-post time and
just after a page change once it is posted. \fBform_init\fR returns the
current form init hook, if any (\fBNULL\fR if there is no such hook).
The function \fBset_form_init\fR sets a hook to be called at form-post time and
just after a page change once it is posted. \fBform_init\fR returns the
current form init hook, if any (\fBNULL\fR if there is no such hook).
The function \fBset_form_term\fR sets a hook to be called at form-unpost time
and just before a page change once it is posted. \fBform_init\fR
returns the current form term hook, if any (\fBNULL\fR if there is no such
The function \fBset_form_term\fR sets a hook to be called at form-unpost time
and just before a page change once it is posted. \fBform_init\fR
returns the current form term hook, if any (\fBNULL\fR if there is no such
Routines that return pointers return \fBNULL\fR on error. Other routines
return one of the following:
.TP 5
Routines that return pointers return \fBNULL\fR on error. Other routines
return one of the following:
.TP 5
System error occurred (see \fBerrno\fR).
.SH SEE ALSO
\fBcurses\fR(3X), \fBform\fR(3X).
System error occurred (see \fBerrno\fR).
.SH SEE ALSO
\fBcurses\fR(3X), \fBform\fR(3X).