Create Stop Watch with Vb.net

Public Class Form1

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

        If Button1.Text = "ចាប់ផ្តើម" Then

            Timer1.Enabled = True

            Button1.Text = "ផ្អាក"

            Button3.Enabled = False

        Else

            Button1.Text = "ផ្អាក"

            Timer1.Enabled = False

            Button1.Text = "ចាប់ផ្តើម"

            Button3.Enabled = True

        End If

    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Timer1.Interval = 1

        Button1.Text = "ចាប់ផ្តើម"

        Button3.Text = "សារដើម"

    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

        Timer1.Enabled = False

        Label1.Text = "0.0"

    End Sub

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick

        Label1.Text = Label1.Text + 0.01

    End Sub

End Class