How to find ASCII value of TAB ?

Hi Friends,
I am trying to find the ASCII value of the TAB character using the standard ASCII function like:
SELECT ASCII('<TAB>') FROM DUAL;
I am executing the above command in SQL*Plus.
It is not treating it as TAB.
It is treating it as space and giving ASCII value of Space -32.
Please let me know how to achieve this?
Database Version - 9i
Regards
Sreekanth Munagala.

Well, evidently mine are smarter... :-)
SQL> select * from v$version;
BANNER
Oracle9i Enterprise Edition Release 9.2.0.8.0 - Production
PL/SQL Release 9.2.0.8.0 - Production
CORE    9.2.0.8.0       Production
TNS for 32-bit Windows: Version 9.2.0.8.0 - Production
NLSRTL Version 9.2.0.8.0 - Production
SQL> select ascii('     ') from dual;
ASCII('')
         9
SQL>
SQL> select * from v$version;
BANNER
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Product
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
SQL> select ascii('     ') from dual;
ASCII('')
         9
SQL>

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