PK_ERROR_code_t    PK_ATTRIB_ask_ustring
(
--- received arguments ---
PK_ATTRIB_t        attrib,      --- attribute
int                field_no,    --- field number (>= 0)

--- returned arguments ---
PK_UCHAR_t **const string       --- pointer to Unicode string
                                --- (possibly NULL)
)


This function returns the Unicode string stored in field number field_no
of the given attribute.


Specific Errors:
    PK_ERROR_bad_field_number       The attribute does not have a field with
                                    this number
    PK_ERROR_field_of_wrong_type    The field is not a Unicode field


If field number field_no is a Unicode string field containing no
characters, then the character string is set to NULL.