public static void ShowPleaseWait(Form self)
        {
            if (GetControll <NotifyPleaseWaitUserControl>(self, null) != null)
            {//既に表示中.
                return;
            }

            NotifyPleaseWaitUserControl notifyControl = new NotifyPleaseWaitUserControl();

            notifyControl.Location = new System.Drawing.Point
                                     (
                (self.Width - notifyControl.Width) / 2
                , (self.Height - notifyControl.Height) / 2
                                     );

            notifyControl.Hide();
            self.Controls.Add(notifyControl);
            notifyControl.BringToFront();
            notifyControl.Show();
            notifyControl.Update();

            LastPleaseWaitStaticCache = notifyControl;
        }