Logging severity levels less than 19 ?

sp_altermessage can be usefull only when I know message number.
But what to do when I want to log all errors with severity 10, 11, 12, etc ?
--
Albert Lyubarsky
Comtec LTD
IsraelAlbert, shalom
http://www.sqlservercentral.com/columnists/RDyess/traceflags_printversion.asp
Lookup 2701 tracse flag
"albertly" <mynickalbert@.community.nospam> wrote in message
news:717D3800-19F9-42A4-9E53-BDB3FD373156@.microsoft.com...
> sp_altermessage can be usefull only when I know message number.
> But what to do when I want to log all errors with severity 10, 11, 12, etc
> ?
> --
> Albert Lyubarsky
> Comtec LTD
> Israel