How use proxyclient with Reportexecution2005?

Hi,

I want to run a report from a SSRS-server in my C# code (i want to export the report in a 2007-2010 excel format).
I know that I need to use the Reportexecution2005 WCF-service but I have never done this before and I can't find any nice examples on the web...
The most examples doesn't deal with a "Soap-client" (they seems to use the webservice-class) and use another kind of Reder-method (with differende parameters).

varclient =newReportExecutionServiceSoapClient();     
var  result = client.Render(???)

Hope someone can help me to with the code...

regards,

Marius H Enerud