Printing a PDF Silently with Adobe Acrobat

I ended up bailing on Adobe Acrobat here and going with FoxIt Reader (Free pdf reader) to do my pdf printing. This is the code I'm using to print via FoxIt in C#:

Process pdfProcess = new Process();
pdfProcess.StartInfo.FileName = @"C:\Program Files (x86)\Foxit Software\Foxit Reader\Foxit Reader.exe";
pdfProcess.StartInfo.Arguments = string.Format(@"-p {0}", fileNameToSave);
pdfProcess.Start();

The above code prints to the default printer but there are command line parameters you can use to specify file and printer. You can use the following syntax:

Foxit Reader.exe -t "pdf filename" "printer name"

Update:

Apparently earlier versions of acrobat do not have the problem outlined above either. If you use a much older version (4.x or something similar) it does not exhibit this problem.

Some printers do support native pdf printing as well so it's possible to send the raw pdf data to the printer and it might print it. See https://support.microsoft.com/en-us/kb/322091 for sending raw data to the printer.

Update 2

In later versions of our software we ended up using a paid product:

http://www.pdfprinting.net/

I've tried both Adobe Reader and Foxit without luck. The current versions of both are very fond of popping up windows and leaving processes running. Ended up using Sumatra PDF which is very unobtrusive. Here's the code I use. Not a trace of any windows and process exits nicely when it's done printing.

    public static void SumatraPrint(string pdfFile, string printer)
    {
        var exePath = Registry.LocalMachine.OpenSubKey(
            @"SOFTWARE\Microsoft\Windows\CurrentVersion" +
            @"\App Paths\SumatraPDF.exe").GetValue("").ToString();

        var args = $"-print-to \"{printer}\" {pdfFile}";

        var process = Process.Start(exePath, args);
        process.WaitForExit();
    }

Nick's answer looked good to me, so I translated it to c#. It works!

using System.Diagnostics;

namespace Whatever
{
static class pdfPrint
{
    public static void pdfTest(string pdfFileName)
    {
       string processFilename = Microsoft.Win32.Registry.LocalMachine
            .OpenSubKey("Software")
            .OpenSubKey("Microsoft")
            .OpenSubKey("Windows")
            .OpenSubKey("CurrentVersion")
            .OpenSubKey("App Paths")
            .OpenSubKey("AcroRd32.exe")
            .GetValue(String.Empty).ToString();

        ProcessStartInfo info = new ProcessStartInfo();
        info.Verb = "print";
        info.FileName = processFilename;
        info.Arguments = String.Format("/p /h {0}", pdfFileName);
        info.CreateNoWindow = true;
        info.WindowStyle = ProcessWindowStyle.Hidden; 
        //(It won't be hidden anyway... thanks Adobe!)
        info.UseShellExecute = false;

        Process p = Process.Start(info);
        p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;

        int counter = 0;
        while (!p.HasExited)
        {
            System.Threading.Thread.Sleep(1000);
            counter += 1;
            if (counter == 5) break;
        }
        if (!p.HasExited)
        {
            p.CloseMainWindow();
            p.Kill();
        }
    }
}

}