form_field_validation(3X)                         form_field_validation(3X)


   NAME
         form_field_validation:  set_field_type, field_type, field_arg - forms
         field data type validation

   SYNOPSIS
         #include <form.h>

         int set_field_type(FIELD *field, FIELDTYPE *type, ...);
         FIELDTYPE *field_type(FIELD *field);
         char *field_arg(FIELD *field);

   DESCRIPTION
         set_field_type associates the specified field type with field.
         Certain field types take additional arguments.  TYPE_ALNUM, for
         instance, requires one, the minimum width specification for the
         field.  The other predefined field types are: TYPE_ALPHA, TYPE_ENUM,
         TYPE_INTEGER, TYPE_NUMERIC, TYPE_REGEXP.

         field_type returns a pointer to the field type of field.  NULL is
         returned if no field type is assigned.

         field_arg returns a pointer to the field arguments associated with
         the field type of field.  NULL is returned if no field type is
         assigned.

   RETURN VALUE
         field_type and field_arg return NULL on error.

         set_field_type returns 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>.

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















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