private void Menu_Click(object sender, EventArgs e)
{
WinOperationClass P_Menu = new WinOperationClass(); //声明对WinForm窗体进行操作的类对象
P_Menu.ShowForm((ToolStripMenuItem)sender, this); //调用类中的方法，完成对窗体中ToolStripMenuItem控件相应项的操作
}