Search option for reports

Hi, I have a report with product names and the number of orders list in it , i want a search option for the report grid where i can search from the list based on the product name. I tried using the report parameter but i dint get exactly how it works. Please help me in resolving this. Thanks 
1 answers

ReportGrid works with dataset as data source. And data set can be OQL or java action.

OQL can take a Parameter

When you have ReportGrid you can add a Report parameter matching the OQL parameter on the page where you add your reportgrid