Noel,

I'm not .NET guru but this is how I accomplish the task you want.

crRpt.SetParameterValue("_Company", Sys.CompanyName)
crRpt.SetParameterValue("_DateFrom", dtpFrom.Value.Date)
crRpt.SetParameterValue("_DateTo", dtpTo.Value.Date)

crv.ReportSource = crRpt

Regards,

Martin