We having o.s.no. of the case but can't able to track the details of the judgement

we have filed a case in 1997 in chennai high court...we having only O.S.No. of the case... we need the details of the case ....we are in pondy and we filled in high court...now there's lot of confusions in tracking this case ... anybody can able to guide me to where to start ??? is there any option to file petition to track the case details ?pls share ur exp,ideas or thoughts