How to use Formula Evaluator?

[subhash medhi]

Dear friends,
                  I am trying to use HSSFFormulaEvaluator but facing certain
problems.
Against the underwritten statement I am getting the message that
HSSFFormulaEvaluator cannot be resolved to a type though i have included the
scratchpad jar in the classpath.



 HSSFFormulaEvaluator evaluator = new HSSFFormulaEvaluator(hs,wb);



Kindly help and let me know if need to include any more jars. Your help
would be appreciated.


Thanks,
Subhash