#region 浮动工具条窗体

    private const int WS_EX_TOOLWINDOW = 0x00000080;
    private const int WS_EX_NOACTIVATE = 0x08000000;
    // 浮动工具条窗体
    protected override CreateParams CreateParams
    {
      get
      {
        CreateParams cp = base.CreateParams;
        cp.ExStyle |= (WS_EX_NOACTIVATE | WS_EX_TOOLWINDOW);
        cp.Parent = IntPtr.Zero; // Keep this line only if you used UserControl
        return cp;
        //return base.CreateParams;
      }
    }

    #endregion