I could not really find them, I don't understand why :(,... anyways, I found this one website here  http://www.koders.com/perl/fid7E4FF59C5979DA8C508A35A34BF82B4C45CD4BE8.aspx?s=excel which is a free search engine for any open source software and it got all the examples that are related to SpreadSheet::WriteExcel