Showing print preview using c# in windows form application

private void printPreview_Click(object sender, EventArgs e)
        {
            PrintPreviewShowing();
        }

private void PrintPreviewShowing()
        { 

            printPreviewControl1.Document = docToPrintOb; 
            docToPrintOb.DefaultPageSettings.Landscape = true;
            docToPrintOb.DefaultPageSettings.PaperSize = new PaperSize("MyPaper", 900, 1100);

            // Add PrintDocument PrintPage event handler
            this.docToPrintOb.PrintPage +=
                new System.Drawing.Printing.PrintPageEventHandler(PrintPageMethod);
        }

private void PrintPageMethod(object sender, PrintPageEventArgs e)
        {
            string text = "Sample text has been \n previewed. ";
            e.Graphics.DrawString(text, new Font("Georgia", 35, FontStyle.Bold),
                Brushes.Black, 100, 100);
        }