Execute Stored Proc And Then Return A Value

ok I have a stored procedure in my MS-SQL Server database.
It looks something like this.....

CREATE PROCEDURE updatePCPartsList
(
@Descriptionvarchar(255),
@ManCodevarchar(255),
@ProdCodevarchar(255),
@Pricedecimal(6,2),
@Commentsvarchar(255)
)
AS

declare @IDFound bigint
declare @LastChangedDate datetime

select @LastChangedDate = GetDate()
select @IDFound = PK_ID from PCPartsList where ProdCode = @ProdCode

if @IDFound > 0
begin
update PCPartsList set Description = @Description, ManCode = @ManCode, ProdCode = @ProdCode, Price = @Price, Comments = @Comments, LastChanged = @LastChangedDate where PK_ID = @IDFound
end
else
insert into PCPartsList (Description, ManCode, ProdCode, Price, Comments, LastChanged) values(@Description, @ManCode, @ProdCode, @Price, @Comments, @LastChangedDate)
GO

It executes fine so I know i've done that much right....
But what i'd like to know is how I can then return a value - specifically @LastDateChanged variable

I think this is a case of i've done the hard part but i'm stuck on the simple part - but i'm very slowly dragging my way through learning SQL.
Someone help?