using System;

 using System.Data;

 using System.Drawing;

 using System.Text;

 using System.Windows.Forms;

 namespace Test05

 {

     public partial class Form1 : Form

     {

         public Form1()

         {

             InitializeComponent();

         }

         private void Form1_Load(object sender, EventArgs e)

         {

             textBox1.PasswordChar = '*';

             textBox2.UseSystemPasswordChar = true;

         }

     }

 }