How to print the existing pdf document using PdfJavaScript ?

            //Load existing PDF document
            PdfLoadedDocument ldoc = new PdfLoadedDocument("Input.pdf");
 
            //Create a PDF Button Field and set the location
            PdfButtonField field = new PdfButtonField(ldoc.Pages[0], "Print");
            field.Bounds = new RectangleF(10, 10, 50, 20);
 
            //Create a new Form
            ldoc.CreateForm();
 
            //Add the field to document
            ldoc.Form.Fields.Add(field);
 
            //Create new Java script Action
            PdfJavaScriptAction javaAction = new PdfJavaScriptAction("this.print({bUI: false, bSilent:false, bShrinkToFit: true});");
 
            //Create a new PDF Annotation Action
            PdfAnnotationActions action = new PdfAnnotationActions();
 
            //Create a new PDF Field Actions
            PdfFieldActions fieldActions = new PdfFieldActions(action));
 
            //set the action to Mouse Enter
            field.Actions.MouseEnter = javaAction;
 
            //Save the document
            ldoc.Save("Output.pdf", HttpContext.ApplicationInstance.Response, HttpReadType.Save);
 
            //Close the document 
            ldoc.Close(true);