Call Oracle Stored Procedure

Question

Hi, im new to using stored procedures and i have the following stored procedure...

CREATE OR REPLACE PROCEDURE DRL_PROCEDURE2(var_SOURCE_OBJECTID IN varchar2, var_NEW_OBJECTID OUT varchar2)
AS
BEGIN
SELECT MAX(NEW_OBJECTID)
INTO var_NEW_OBJECTID
FROM DRL_CONVERSION
WHERE SOURCE_OBJECTID = var_SOURCE_OBJECTID;
END;

I want to be able to call this procedure from my windows form application and display the result of the stored procedure into a label or a datagrid using C#...could someone please help me! Thanks in advance