How can we read protected password excel file (.xls) with POI API

I've just learned POI and find the HSSF is very simple to read and create excel file (.xls). However, I found some problem when want to read excel protected with password. It took me an hour to find this solution on internet.

Please could you help me to solve this problem. I'm very glad if you could give me a code snippet.

Thank you.

Someone else asked (almost) the same question a few days ago. Unfortunately there are no replies there either...

I posted a reply in the other topic; let us know how you make out in case you try that.

Thank you for your reply.
However, I didn't find reply about read protected password excel file (.xls) with POI API in other topic.
I'm looking forward to your help.

Thanks