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-
-</PRE>
-<H2>NAME</H2><PRE>
- <B>form_hook</B> - set hooks for automatic invocation by applica-
- tions
-
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-</PRE>
-<H2>SYNOPSIS</H2><PRE>
- <B>#include</B> <B>&lt;form.h&gt;</B>
- int set_field_init(FORM *form, void (*func)(FORM *));
- void (*)(FORM *) field_init(const FORM *form);
- int set_field_term(FORM *form, void (*func)(FORM *));
- void (*)(FORM *) field_term(const FORM *form);
- int set_form_init(FORM *form, void (*func)(FORM *));
- void (*)(FORM *) form_init(const FORM *form);
- int set_form_term(FORM *form, void (*func)(FORM *));
- void (*)(FORM *) form_term(const FORM *form);
-
-
-</PRE>
-<H2>DESCRIPTION</H2><PRE>
- These functions make it possible to set hook functions to
- be called at various points in the automatic processing of
- input event codes by <B>form_driver</B>.
-
- The function <B>set_field_init</B> sets a hook to be called at
- form-post time and each time the selected field changes
- (after the change). <B>field_init</B> returns the current field
- init hook, if any (<B>NULL</B> if there is no such hook).
-
- The function <B>set_field_term</B> sets a hook to be called at
- form-unpost time and each time the selected field changes
- (before the change). <B>field_term</B> returns the current field
- term hook, if any (<B>NULL</B> if there is no such hook).
-
- The function <B>set_form_init</B> sets a hook to be called at
- form-post time and just after a page change once it is
- posted. <B>form_init</B> returns the current form init hook, if
- any (<B>NULL</B> if there is no such hook).
-
- The function <B>set_form_term</B> sets a hook to be called at
- form-unpost time and just before a page change once it is
- posted. <B>form_init</B> returns the current form term hook, if
- any (<B>NULL</B> if there is no such hook).
-
-
-</PRE>
-<H2>RETURN VALUE</H2><PRE>
- Routines that return pointers return <B>NULL</B> on error. Other
- routines return one of the following:
-
- <B>E_OK</B> The routine succeeded.
-
- <B>E_SYSTEM_ERROR</B>
- System error occurred (see <B>errno</B>).
-
-
-</PRE>
-<H2>SEE ALSO</H2><PRE>
- <B><A HREF="ncurses.3x.html">curses(3x)</A></B>, <B><A HREF="form.3x.html">form(3x)</A></B>.
-
-
-</PRE>
-<H2>NOTES</H2><PRE>
- The header file <B>&lt;form.h&gt;</B> automatically includes the header
- file <B>&lt;curses.h&gt;</B>.
-
-
-</PRE>
-<H2>PORTABILITY</H2><PRE>
- These routines emulate the System V forms library. They
- were not supported on Version 7 or BSD versions.
-
-
-</PRE>
-<H2>AUTHORS</H2><PRE>
- Juergen Pfeifer. Manual pages and adaptation for new
- curses by Eric S. Raymond.
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