Functions returning RECORD

Hi

I come from a MS-SQL background and am trying to figure out what is wrong with the function below:
*****************************************************************************************
CREATE OR REPLACE FUNCTION GetAccountInfo (p_AccID int)
RETURNS record
AS
$$
DECLARE
r_Return record;
BEGIN
SELECT a.Field1, a.Field2, a.Field4
INTO r_Return
FROM Account
WHERE a.AccID = p_AccID;

RETURN r_Return;
END;
$$
language 'plpgsql';
*****************************************************************************************
When I run select * from GetAccountInfo (100) I get the following error message: ERROR: a column definition list is required for functions returning "record"

please can someone explain to me how to create a column definition list.

Thanks