Shutdown Komputer

tidak menggunakan progressBar pun tidak apa-apa ...

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        ProgressBar1.Value = 0
        If RadioButton1.Checked = True Then
            Shell("shutdown -s")
            ProgressBar1.Value = 0
        ElseIf RadioButton2.Checked = True Then
            Shell("shutdown -l")
            ProgressBar1.Value = 0
        ElseIf RadioButton3.Checked = True Then
            Shell("shutdown -r")
            ProgressBar1.Value = 0
        End If
    End Sub