C＃ winform 右下角弹出窗口结果

右下角弹窗界面：

以下是代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using System.Runtime.InteropServices;

namespace 右下角弹窗
{
    public partial class Form1 : Form
    {

        [DllImport("user32")]
        private static extern bool AnimateWindow(IntPtr hwnd,int dwTime,int dwFlags);

        //声明常量
        private const int AW_HOR_POSITIVE = 0x0001;     //自左向右显示窗口
        private const int AW_HOR_NEGATIVE = 0x0002;    //自右向左显示窗口
        private const int AW_VER_POSITIVE = 0x0004;      //自顶向下显示窗口
        private const int AW_VER_NEGATIVE = 0x0008;     //自下向上显示窗口
        //以上标记可以在迁移转变动画和滑动动画中应用，应用AW_CENTER标记时忽视该标记

        private const int AW_CENTER = 0x0010;    //若应用了AW_HIDE标记，则使窗口向内重叠，不然向外扩大
        private const int AW_HIDE = 0x10000;      //隐蔽窗口
        private const int AW_ACTIVE = 0x20000;   //激活窗口，在应用了AW_HIDE标记后不要应用这个标记
        private const int AW_SLIDE = 0x40000;     //应用滑动类型结果，默认迁移转变动画类型，当应用AW_CENTER标记时该标记补忽视
        private const int AW_BLEND = 0x80000;    //应用应用淡入淡出效果


        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            int x = Screen.PrimaryScreen.WorkingArea.Right - this.Width;
            int y = Screen.PrimaryScreen.WorkingArea.Bottom - this.Height;
            this.Location = new Point(x,y);  //设置窗体在屏幕右下角显示

            //AnimateWindow(this.Handle,1000,AW_SLIDE|AW_ACTIVE|AW_VER_NEGATIVE);

            AnimateWindow(this.Handle, 250, AW_BLEND | AW_ACTIVE | AW_VER_NEGATIVE);
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            AnimateWindow(this.Handle,250,AW_BLEND|AW_HIDE);
        }
    }
}