protected override CreateParams CreateParams
      {
         get
         {
            CreateParams p = base.CreateParams;
            p.ExStyle |= (WS_EX_NOACTIVATE | WS_EX_TOOLWINDOW | WS_EX_TOPMOST);
            p.Parent = IntPtr.Zero;
            return p;
         }
      }

    public void ShowFloating()
      {
         if (this.Handle == IntPtr.Zero)
         {
            base.CreateControl();
         }
         SetParent(base.Handle, IntPtr.Zero);
         ShowWindow(base.Handle, 1);
      }