How to Pass File as inoput parameter to

I have the web service request

[quote]<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:tem="http://tempuri.org/">
   <soapenv:Header/>
   <soapenv:Body>
      <tem:GetFile>
         <!--Optional:-->
         <tem:ID>0000000000000089</tem:ID>
         <tem:Token>12345678-1234-1234-1234-123456789111</tem:Token>
         <tem:ApplicationVersionID>32</tem:ApplicationVersionID>
         <!--Optional:-->
         <tem:FileName>[b]version2.xml[/b]</tem:FileName>
      </tem:GetFile>
   </soapenv:Body>
</soapenv:Envelope>[/quote]

In the FileName i want to pass a file as an input how can do that.please help
any ideas will be great