Print Combobox and Listbox items to Printer

Try this
namespace ListPrint
{
  public partial class Form1 : Form
  { 
  public Form1()
  {
  InitializeComponent();
  }

  Font myFont = new Font("Arial", 16);


  private void Form1_Load(object sender, EventArgs e)
  {
  loadList();
  }

  public void loadList()
  {
  listBox1.Items.Add("Dog");
  listBox1.Items.Add("Cat");
  listBox1.Items.Add("Horse");
  listBox1.Items.Add("Cow");
  }

 
  private void bttnPreview_Click(object sender, EventArgs e)
  {
 
  printPreviewDialog1.Document = printDocument1;
  ((Form)printPreviewDialog1).WindowState = FormWindowState.Maximized;

  printPreviewDialog1.ShowDialog();

  }

  private void bttnPrint_Click(object sender, EventArgs e)
  {
  printDocument1.Print();
  }


  private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
  {
 
  int x = 20, y = 20,i = 0;
  foreach (string str in listBox1.Items)
  {
  e.Graphics.DrawString(str, myFont, Brushes.Black, x, y);
  y += 25;
  i++;
  }

  }
  }
}