form_hook(3X)                    UNIX System V                    form_hook(3X)


NAME
      formhook:  setforminit, forminit, setformterm, formterm,
      setfieldinit, fieldinit, setfieldterm, fieldterm - assign
      application-specific routines for invocation by forms

SYNOPSIS
      #include <form.h>

      int setforminit(FORM *form, void (*func)(FORM *));
      void (*)(FORM *) forminit(FORM *form);
      int setformterm(FORM *form, void (*func)(FORM *));
      void (*)(FORM *) formterm(FORM *form);
      int setfieldinit(FORM *form, void (*func)(FORM *));
      void (*)(FORM *) fieldinit(FORM *form);
      int setfieldterm(FORM *form, void (*func)(FORM *));
      void (*)(FORM *) fieldterm(FORM *form);

DESCRIPTION
      These routines allow the programmer to assign application specific
      routines to be executed automatically at initialization and termination
      points in the forms application.  The user need not specify any
      application-defined initialization or termination routines at all, but
      they may be helpful for displaying messages or page numbers and other
      chores.

      setforminit assigns an application-defined initialization function to
      be called when the form is posted and just after a page change.
      forminit returns a pointer to the initialization function, if any.

      setformterm assigns an application-defined function to be called when
      the form is unposted and just before a page change.  formterm returns a
      pointer to the function, if any.

      setfieldinit assigns an application-defined function to be called when
      the form is posted and just after the current field changes.  fieldinit
      returns a pointer to the function, if any.

      setfieldterm assigns an application-defined function to be called when
      the form is unposted and just before the current field changes.
      fieldterm returns a pointer to the function, if any.

RETURN VALUE
      Routines that return pointers always return NULL on error.  Routines that
      return an integer return one of the following:
      E_OK           - The function returned successfully.
      E_SYSTEM_ERROR - System error.

NOTES
      The header file form.h automatically includes the header files eti.h and
      curses.h.




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form_hook(3X)                    UNIX System V                    form_hook(3X)


SEE ALSO
      curses(3X), forms(3X)




















































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