or
this.PageSettings.Landscape = true;this.PageSettings.PaperKind = System.Drawing.Printing.PaperKind.Letter;m_ReelLabel.UnitOfMeasure = UnitType.Mm;
m_ReelLabel.Width = new Unit(98.0, UnitType.Mm);
DetailSection detail = new DetailSection();
detail.Height = new Unit(50.0, UnitType.Mm);
m_ReelLabel.PageSettings.PaperKind = PaperKind.Custom;m_ReelLabel.PageSettings.PaperSize = new SizeU(new Unit(104, UnitType.Mm), new Unit(60, UnitType.Mm));m_ReelLabel.PageSettings.Margins.Left = new Unit(2.0, UnitType.Mm);m_ReelLabel.PageSettings.Margins.Right = new Unit(2.0, UnitType.Mm);m_ReelLabel.PageSettings.Margins.Top = new Unit(2.0, UnitType.Mm);m_ReelLabel.PageSettings.Margins.Bottom = new Unit(2.0, UnitType.Mm);InstanceReportSource src = new InstanceReportSource();src.ReportDocument = m_ReelLabel;PrinterSettings printerSettings = new PrinterSettings();PrintController standardPrintController = new StandardPrintController();Telerik.Reporting.Processing.ReportProcessor processor = new Telerik.Reporting.Processing.ReportProcessor();processor.PrintController = standardPrintController;processor.PrintReport(src, printerSettings);