<script runat="server">
 override protected void OnInit(EventArgs args)
 {
  Editor1.PostBackCommand += new System.Web.UI.WebControls.CommandEventHandler(Editor1_PostBackCommand);
  base.OnInit(args);
 }

 private void Editor1_PostBackCommand(object sender, System.Web.UI.WebControls.CommandEventArgs e)
 {
  Label1.Text="You just click the button : "+e.CommandName;
 }
</script>