CREATE FUNCTION?

Hello!
How can I make this function in MS SQL:
CREATE FUNCTION id_name() RETURNS INTEGER
 AS 'SELECT MAX(ID)+1 FROM Test;'
Thanks!

CREATE FUNCTION id_name ()
RETURNS integer

AS

BEGIN

declare @.Return integer
@.return =SELECT MAX(ID)+1 FROM Test
return @.return

END

Limno

|||CREATE FUNCTION id_name RETURNS INTEGER
AS SELECT MAX(ID)+1 FROM Test