setting column width

I am using the Spreadsheet Excel Writer tool to export a php generated page to an Excel Spreadsheet. The information is being generated properly but the display is not functioning as I would like. The column headers are not automatically setting the width of the column as I was expecting. I have googled for this information but I have not been able to find an answer. I'm beginning to think that it is not possible. Before I go on to something else I thought I would ask the group. Is there a way to set the column width using the writer tool? Also, is there a way of putting a break in the column headers? For example I want... Total Amount to look like... Total Amount Thanks for any help Jef