C# 无边框可拖动、可改变大小窗体（）

如下图，无边框，但是一个可以拖动的、可改变大小的窗体

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;

namespace NonBorderForm
{
    public partial class NoneFrm : Form
    {
        public NoneFrm（）
        {
            InitializeComponent（）;
        }

        const int Guying_HTLEFT = 10;
        const int Guying_HTRIGHT = 11;
        const int Guying_HTTOP = 12;
        const int Guying_HTTOPLEFT = 13;
        const int Guying_HTTOPRIGHT = 14;
        const int Guying_HTBOTTOM = 15;
        const int Guying_HTBOTTOMLEFT = 0x10;
        const int Guying_HTBOTTOMRIGHT = 17;
        protected override void WndProc（ref Message m）
        {
            switch （m.Msg）
            {

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2019-07-28 08:58  NonBorderForm\
     目录           0  2019-07-28 09:01  NonBorderForm\NonBorderForm\
     文件        1008  2019-07-28 08:58  NonBorderForm\NonBorderForm.sln
     文件       34816  2019-07-28 09:04  NonBorderForm\NonBorderForm.v12.suo
     目录           0  2019-07-28 09:00  NonBorderForm\NonBorderForm\bin\
     目录           0  2019-07-28 09:01  NonBorderForm\NonBorderForm\bin\Debug\
     文件        8704  2019-07-28 09:01  NonBorderForm\NonBorderForm\bin\Debug\NonBorderForm.exe
     文件       19968  2019-07-28 09:01  NonBorderForm\NonBorderForm\bin\Debug\NonBorderForm.pdb
     文件       24216  2019-07-28 09:01  NonBorderForm\NonBorderForm\bin\Debug\NonBorderForm.vshost.exe
     目录           0  2019-07-28 09:00  NonBorderForm\NonBorderForm\bin\Release\
     文件        3750  2019-07-28 09:01  NonBorderForm\NonBorderForm\NonBorderForm.csproj
     文件        2513  2019-07-28 09:01  NonBorderForm\NonBorderForm\NoneFrm.cs
     文件        1485  2019-07-28 09:01  NonBorderForm\NonBorderForm\NoneFrm.Designer.cs
     文件        5817  2019-07-28 09:01  NonBorderForm\NonBorderForm\NoneFrm.resx
     目录           0  2019-07-28 08:58  NonBorderForm\NonBorderForm\obj\
     目录           0  2019-07-28 09:01  NonBorderForm\NonBorderForm\obj\Debug\
     文件         865  2019-07-28 08:58  NonBorderForm\NonBorderForm\obj\Debug\DesignTimeResolveAssemblyReferences.cache
     文件        6818  2019-07-28 09:00  NonBorderForm\NonBorderForm\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     文件         684  2019-07-28 09:01  NonBorderForm\NonBorderForm\obj\Debug\NonBorderForm.csproj.FileListAbsolute.txt
     文件         979  2019-07-28 09:01  NonBorderForm\NonBorderForm\obj\Debug\NonBorderForm.csproj.GenerateResource.Cache
     文件        2211  2019-07-28 09:01  NonBorderForm\NonBorderForm\obj\Debug\NonBorderForm.csprojResolveAssemblyReference.cache
     文件        8704  2019-07-28 09:01  NonBorderForm\NonBorderForm\obj\Debug\NonBorderForm.exe
     文件         180  2019-07-28 09:01  NonBorderForm\NonBorderForm\obj\Debug\NonBorderForm.NoneFrm.resources
     文件       19968  2019-07-28 09:01  NonBorderForm\NonBorderForm\obj\Debug\NonBorderForm.pdb
     文件         180  2019-07-28 09:01  NonBorderForm\NonBorderForm\obj\Debug\NonBorderForm.Properties.Resources.resources
     目录           0  2019-07-28 08:58  NonBorderForm\NonBorderForm\obj\Debug\TempPE\
     文件         496  2019-07-28 09:00  NonBorderForm\NonBorderForm\Program.cs
     目录           0  2019-07-28 08:58  NonBorderForm\NonBorderForm\Properties\
     文件        1350  2019-07-28 08:58  NonBorderForm\NonBorderForm\Properties\AssemblyInfo.cs
     文件        2878  2019-07-28 08:58  NonBorderForm\NonBorderForm\Properties\Resources.Designer.cs
     文件        5612  2019-07-28 08:58  NonBorderForm\NonBorderForm\Properties\Resources.resx
............此处省略2个文件信息