usage of Range object from JXL api

Hi,

I need to find values of a range of cells in an excel sheet.I already have Jxl api (2.6.10) which does various operation in excel sheet.

I was googling and found that by using 'Worksheet' class we can get Range object (using getRange() method)
link : http://www.teamdev.com/downloads/jexcel/javadoc/com/jniwrapper/win32/jexcel/Worksheet.html

However,i'm unable to find anything on the net from where to download the mentioned package 'com.jniwrapper.win32.jexcel.Worksheet' in order to use Worksheet class..
or is there any other way to find the range of cells from the excel spread sheet ?

Much appreciate your replies.

Thanks,
kailash.