This program uses the following code to print directly to the printer named "Dell Photo AIO Printer 926."

// Print.
private void btnPrint_Click(object sender, EventArgs e)
{
    // Select the printer.
    pdocSmiley.PrinterSettings.PrinterName = "Dell Photo AIO Printer 926";

    // Print.
    pdocSmiley.Print();
}

The code first sets the PrinterSettings object's PrinterName property to select the printer. It then calls the PrintDocument object's Print method to immediately send the printout to that printer.