public static class myPrinters 
          {
          [DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)] 
          public static extern bool SetDefaultPrinter(string Name);
         }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)

printJob.StartInfo.FileName = testString;
                            printJob.StartInfo.UseShellExecute = true;
                            printJob.StartInfo.Verb = "print";
                            printJob.StartInfo.Arguments = comboBox1.SelectedText;

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;

string[] filenames = System.IO.Directory.GetFiles(listBox1.itemvalue.selectedpath, "*");

private void Form1_Load(object sender, EventArgs e)
        {
            string Path = "C:\\Users\\AM6846\\Desktop\\Folder";
            DirectoryInfo dir = new DirectoryInfo(Path);
            this.listBox1.Items.AddRange(dir.GetDirectories());
            textBox1.Text = Path;
          
            
        }
       // string filename;
        
        private

using System;
using System.Collections.Generic;
using System.ComponentModel;