Print a document without show PrintDialog

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C#

printing

Hi :)

I have a folder with 10 pdfs, and, I whant to know how I can print this 10 pdfs without show the printdialog, for all pdfs, something like this:

public void PrintAllDocuments()
        {
            string[] AllFiles = Directory.GetFiles(@"C:\PDF\", "*.pdf", SearchOption.AllDirectories);

            for (int i = 0; i < AllFiles.Length; i++)
            {
                PrintFile pf = new PrintFile(AllFiles[i]);
                pf.printerName = "HP ???";
                pf.paper = "A4";
                pf.Print();
            }
        }

of course, that is some a sample... but, How I can configure the printer and print the document, witout use the PrintDialog... to open the PDF and print the PDF, how I can do this ??? :(

Thanks for help. :)