Require vba or formula for convert general format data in date format

Hello All
We have a database where in Colum H Date format data Enterd in General Format.. in following type
CURRENT DATA
Jul,2003
Mar,2003
Dec,2003
Mar,2001
Mar,2003

We want above column H General Format Data in Date format following type in Colum I
REQUIRED DATA
Jul-03
Mar-03
Dec-03
Mar-01
Mar-03

Currently when we replaCE ,20 in - then data convert in data format but show
Jul-13
3-Mar
3-Dec
1-Mar
3-Mar



FORUM EXPERT/GURU'S IF U PROVIDE ME A VBA OR FORMULA FOR MY ABOVE PROBLEM THEN I WILL REALLY THANKFULL TO YOU.

THANKS IN ADVANCE

SANTOSH