MS-Excel On PHP4

[Anon]

I use this header for exchange data from php to MS-Excel. -->
Header("Content-Disposition: inline; filename=myfile.xls");

Header("Content-Description: PHP4 Generated Data");

Header("Content-type: application/vnd.ms-excel; name='RepExcel'");

flush;

But I have a problem to encode Font type.
I use style sheet but not corect font.I want to know this code that correct.Thank you very much.