private void btnPrintDocument_Click(object sender, EventArgs e)
        {
            // This function prints a document

            // Setup general parameters
            string fileName = @"c:\temp\test.pdf";

            // Check to see if the library has been successfully unlocked
            if (qp.Unlocked() == 1)
            {
                // Load the document that you want to print into memory
                int docID = qp.LoadFromFile(fileName, "");

                // Set the paramters for the PrintDocument function
                string PrinterName = qp.GetDefaultPrinterName();
                int StartPage = 1; // Set first page number
                int EndPage = qp.PageCount(); // Set last page number

                // Set the paramters for the PrintOptions function
                int PageScaling = 0;
                int AutoRotateCenter = 0;
                string Title = fileName;

                // Assign the options for printing to an int variable
                int Options = qp.PrintOptions(PageScaling, AutoRotateCenter, Title);
                string printerName = qp.NewCustomPrinter("Adobe PDF");
                //string printerName = qp.NewCustomPrinter("Xerox Phaser 3117");
                //qp.SetupCustomPrinter(printerName, 0, 0);
                qp.SetupCustomPrinter(printerName, 2, 500);
                qp.SetupCustomPrinter(printerName, 3, 1000);
                qp.SetupCustomPrinter(printerName, 4, 5);
                qp.SetupCustomPrinter(printerName, 11, 2);
                // Print the document with the required paramters and options specified
                qp.PrintDocument(printerName, StartPage, EndPage, Options);

                // Remove document from memory
                qp.RemoveDocument(docID);
            }
            else
            {
                // If library could not be unlocked warn the user
                MessageBox.Show("License key could not be validated. The library was not unlocked.");
            }
        }