How to use zebra TLP 2844 with c# code

This is my code its printing in normal printer .. but instead of normal printing machine i want to use zebra printing machine tpl 2844 for printing the ReturnIDcount with barcode ..

what should be my first step for this process

try
                    {
                        
                    
                        string Patient_name = NameTxtBx.Text, Export_TO = ToTxtBx0.Text  ;
                        int PatNoVal;
                        PatNoVal = Convert.ToInt32(PatNo.Text);
                        PatNoVal = int.Parse(PatNo.Text);
                        decimal PatID = decimal.Parse(PatID_NO.Text);
                        int? replay_To_type = Int16.Parse(DropDownList1.SelectedValue);
                        int? reptype = Int16.Parse(RadioButtonList2.SelectedValue);
                        try
                        {

                           con.Open();
                            SqlCommand cmd = new SqlCommand();
                            cmd.CommandType = CommandType.StoredProcedure;
                            cmd.CommandText = "usp_NEW_TRANSACTIONS";
                            cmd.Parameters.AddWithValue("@Patient", Patient_name);
                            cmd.Parameters.AddWithValue("@E_TO", Export_TO);
                            cmd.Parameters.AddWithValue("@R_type", reptype);
                            cmd.Parameters.AddWithValue("@User_name", Label1.Text = Session["name"].ToString());
                            cmd.Parameters.AddWithValue("@ReportType", replay_To_type);
                            cmd.Parameters.AddWithValue("@Patient_no", PatNoVal);
                            cmd.Parameters.AddWithValue("@Patient_ID_NO", PatID);
                            cmd.Parameters.Add("@ReturnIDcount", SqlDbType.NVarChar, 50);
                            cmd.Parameters["@ReturnIDcount"].Direction = ParameterDirection.Output;
                            cmd.Connection = con;
                            cmd.ExecuteNonQuery();
                            con.Close();
                            Print("Your ID is : " + cmd.Parameters["@ReturnIDcount"].Value.ToString());
                            
                            
                       
                        }
                        catch (Exception ex)
                        {
                            Message("Block 3: Error\nThe Reported fault is:\n" + ex.Message, this);
                        }
                        PatNo.Text = "";
                        NameTxtBx.Text = "";
                        ToTxtBx0.Text = "";
                        DropDownList1.SelectedIndex = -1;
                        RadioButtonList2.SelectedIndex = -1;
                        }
                    catch
                    {
                        Message(" ERROR 20", this);
                    }

                }
            }
            catch
            {
                Message("data is incorrect", this);
            }
        }
      
       

        //private void Print(string recordIdCount)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("<script type = 'text/javascript'>");
            sb.Append("window.onload = new function(){");
            sb.Append("var printWin = window.open('', '', 'left=0");
            sb.Append(",top=0,width=1000,height=600,status=0');");
            sb.Append("printWin.document.write(\"");
            sb.Append(recordIdCount);
            sb.Append("\");");
            sb.Append("printWin.document.close();");
            sb.Append("printWin.focus();");
            sb.Append("printWin.print();");
            sb.Append("printWin.close();};");
            sb.Append("</script>");
            ClientScript.RegisterStartupScript(this.GetType(), "key", sb.ToString(), false);
        }

        protected void DropDownList1_DataBound(object sender, EventArgs e)
        {
            DropDownList1.Items.Insert(0, "--Select One--");
        }