How Do I Create A Coding To Hide Login Password In Visual Basic 2012 (Oop Method)

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VB

hello, i'm working on coding of login form program using visual studio 2012 and SQL server 2012.

the function i want is this:
when i type the password during login the password will show "*" instead of the password.

what is the coding to do that?

my login form:

Public Class Form2

    Private Sub Form2_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        BackColor = Color.LightGray
    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        ClassSiswa.namadatabase = "KPIRWAN"
        Dim caridata As SqlClient.SqlDataReader
        caridata = ClassSiswa.CariDataPengguna(ClassSiswa.opencon, TextBox1.Text, TextBox2.Text)
        If Not caridata.Read Then
            MsgBox("Nama dan Sandi Tidak Terdaftar")
        Else
            Me.Hide()
            Form1.Show()
        End If
        ClassSiswa.closecon()
    End Sub

End Class