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, and 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.

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.

See attributes(5) for descriptions of the following attributes:

curses(3CURSES), forms(3CURSES), attributes(5)

The header <form.h> automatically includes the headers <eti.h> and <curses.h>.