VB.NET Disable Alt+F4 ขอถามเกี่ยวกับการห้ามกด Alt+Tab กับ Alt+F4 หน่อยครับ

Private Sub Form1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyDown
        '  Code to Override the Alt-F4 keys combination
        If e.KeyData = Keys.Alt + Keys.F4 Then
            MessageBox.Show("Nice Try!  You must log on with a password.", "Security", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
            e.Handled = True
        End If
End Sub

Protected Overrides Sub OnKeyDown(ByVal e As KeyEventArgs) MyBase.OnKeyDown(e)
        If (e.Alt AndAlso e.KeyCode = Keys.F4) Then
                e.Handled = True
        End If
End Sub