winform自定义日历+鼠标穿透

右下角任务栏点击开启，鼠标点击窗体下一层

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

namespace CalendarPenetrate
{
    public partial class Form1 : Form
    {
        public Form1（）
        {
            InitializeComponent（）;
        }

        Point CPoint;
        private void monthCalendar1_MouseDown（object sender MouseEventArgs e）
        {
            CPoint = new Point（-e.X -e.Y）;
        }

        private void monthCalendar1_MouseMove（object sender MouseEventArgs e）
        {
            if （e.Button == MouseButtons.Left）
            {
                Point myPosittion = Control.MousePosition;//获取当前鼠标的屏幕坐标
      

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2020-01-14 09:39  鼠标穿透\
     目录           0  2020-01-14 09:39  鼠标穿透\.vs\
     目录           0  2020-01-14 09:39  鼠标穿透\.vs\CalendarPenetrate\
     目录           0  2020-01-14 09:39  鼠标穿透\.vs\CalendarPenetrate\v16\
     文件       17408  2020-01-14 09:46  鼠标穿透\.vs\CalendarPenetrate\v16\.suo
     目录           0  2020-01-14 09:39  鼠标穿透\.vs\CalendarPenetrate\v16\Server\
     目录           0  2020-01-14 09:39  鼠标穿透\.vs\CalendarPenetrate\v16\Server\sqlite3\
     文件           0  2020-01-14 09:39  鼠标穿透\.vs\CalendarPenetrate\v16\Server\sqlite3\db.lock
     文件      503808  2020-01-14 09:46  鼠标穿透\.vs\CalendarPenetrate\v16\Server\sqlite3\storage.ide
     目录           0  2020-01-14 09:39  鼠标穿透\Backup\
     目录           0  2020-01-14 09:39  鼠标穿透\Backup\CalendarPenetrate\
     文件         941  2009-02-07 14:10  鼠标穿透\Backup\CalendarPenetrate.sln
     文件        3745  2009-02-07 14:17  鼠标穿透\Backup\CalendarPenetrate\CalendarPenetrate.csproj
     文件        3261  2009-02-07 14:18  鼠标穿透\Backup\CalendarPenetrate\Form1.cs
     文件        4493  2009-02-07 14:17  鼠标穿透\Backup\CalendarPenetrate\Form1.Designer.cs
     文件       11423  2009-02-07 14:17  鼠标穿透\Backup\CalendarPenetrate\Form1.resx
     文件         498  2009-02-07 14:10  鼠标穿透\Backup\CalendarPenetrate\Program.cs
     目录           0  2020-01-14 09:39  鼠标穿透\Backup\CalendarPenetrate\Properties\
     文件        1366  2009-02-07 14:10  鼠标穿透\Backup\CalendarPenetrate\Properties\AssemblyInfo.cs
     文件        2884  2009-02-07 14:10  鼠标穿透\Backup\CalendarPenetrate\Properties\Resources.Designer.cs
     文件        5612  2009-02-07 14:10  鼠标穿透\Backup\CalendarPenetrate\Properties\Resources.resx
     文件        1102  2009-02-07 14:10  鼠标穿透\Backup\CalendarPenetrate\Properties\Settings.Designer.cs
     文件         249  2009-02-07 14:10  鼠标穿透\Backup\CalendarPenetrate\Properties\Settings.settings
     目录           0  2020-01-14 09:41  鼠标穿透\CalendarPenetrate\
     文件        1156  2020-01-14 09:39  鼠标穿透\CalendarPenetrate.sln
     文件       14336  2009-02-07 14:21  鼠标穿透\CalendarPenetrate.suo
     目录           0  2010-12-12 01:00  鼠标穿透\CalendarPenetrate\bin\
     目录           0  2012-04-24 19:56  鼠标穿透\CalendarPenetrate\bin\Debug\
     文件       13824  2020-01-14 09:41  鼠标穿透\CalendarPenetrate\bin\Debug\CalendarPenetrate.exe
     文件       22016  2020-01-14 09:41  鼠标穿透\CalendarPenetrate\bin\Debug\CalendarPenetrate.pdb
     文件       14328  2009-02-07 14:21  鼠标穿透\CalendarPenetrate\bin\Debug\CalendarPenetrate.vshost.exe
............此处省略28个文件信息