Winfrom 右下角消息通知动画显示

添加以下两个类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace FileX
{
    internal static class NativeMethods
    {
        /// <summary>
        /// Gets the handle of the window that currently has focus.
        /// </summary>
        /// <returns>
        /// The handle of the window that currently has focus.
        /// </returns>
        [DllImport("user32")]
        internal static extern IntPtr GetForegroundWindow();

        /// <summary>
        /// Activates the specified window.
        /// </summary>
        /// <param name="hWnd">
        /// The handle of the window to be focused.
        /// </param>
        /// <returns>
        /// True if the window was focused; False otherwise.
        /// </returns>
        [DllImport("user32")]