h_id

IN:

Access identifier returned by Hstartwrite

	Purpose	Specifies that the specified element can be appended to
	Return value	Returns SUCCEED (or 0) if data element can be appended and FAIL (or -1) otherwise.
	Description	If a data element is at the end of a file Happendable allows Hwrite to append data to it, converting it to linked-block element only when necessary.