Make Application Flash In Taskbar

Imports System.Runtime.InteropServices
Public Class Form1
    <DllImport("user32.dll", EntryPoint:="FlashWindow")>
    Public Shared Function FlashWindow(ByVal hWnd As Integer, ByVal bInvert As Integer) As Integer
    End Function
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        FlashWindow(Me.Handle, 1)
    End Sub
End Class