VS 2010 button behavior to avoid multiple clicks

hi
I have a button which becomes grayed and inactive when you click on it
but if you clicked two or more times instantly it memorize all clicks
despite that

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


what i need to do so it will click it only one time
thank you