explain the parameter name & value in report generating

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C#

C#4.0

Hi,

i'm new to generate reports, so i refer the existing report in my project in that they store the information in string and pass that value to report. But what is my doubt is please explain the highlighted line, how to pass & what values are to pass the parameter name & value.

string str="<Parameters>" +
"<StaticParam Name='Proj_Code' Value='" + Proj_Code + "' Type='Varchar' />"    +"</Parameters>

Response.Redirect(objCurrentSite.WebSiteURL + "/_layouts/Reports/ViewReport.aspx?ReportPath=" + Server.UrlEncode(ReportPath) + "&RptParamXML=" + Server.UrlEncode(str));

Please be explain it ..

Thanks in Advance..