求大神啊~！烦死我啦~！C#实现窗体自动隐藏+Form圆角

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.IO;

using System.Diagnostics;

using System.Runtime.InteropServices;

using Microsoft.Win32;

using System.Drawing.Drawing2D;



namespace AutoApp

{

    public partial class Form1 : Form

    {

        [DllImport("user32.dll")]

        public static extern bool ReleaseCapture();

        [DllImport("user32.dll")]

        public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);

        public const int WM_SYSCOMMAND = 0x0112;

        public const int SC_MOVE = 0xF010;

        public const int HTCAPTION = 0x0002;

        int formwidth;

        int formheight;

        public Form1()

        {

            InitializeComponent();

        }

        private void form_toolStyle_MouseDown(object sender, MouseEventArgs e)

        {

            ReleaseCapture();

            SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);

        }

        private void form_toolStyle_MouseLeave(object sender, EventArgs e)

        {

            int nowx = Cursor.Position.X;

            int nowy = Cursor.Position.Y;

            if (nowx >= (this.Location.X + this.Width) | nowx <= this.Location.X | nowy <= this.Location.Y | nowy >= (this.Location.Y + this.Height))

            {

                if (this.Location.X == 0)

                {

                    this.Width = 0;

                }

                if (this.Location.Y == 0)

                {

                    this.Height = 0;

                }

            }

        }

        private void form_toolStyle_Move(object sender, EventArgs e)

        {

            formwidth = this.Width;

            formheight = this.Height;

            int x = this.Location.X;

            int y = this.Location.Y;

            if (x <= 0)

            {

                this.Location = new System.Drawing.Point(0, y);

                this.Width = 0;

            }

            if (y <= 0)

            {

                this.Location = new System.Drawing.Point(x, 0);

                this.Height = 0;

            }

        }

        private void form_toolStyle_MouseEnter(object sender, EventArgs e)

        {

            this.Width = formwidth;

            this.Height = formheight;

        }

        //public void SetWindowRegion()

        //{

            //GraphicsPath FormPath;

            //FormPath = new System.Drawing.Drawing2D.GraphicsPath();

            //Rectangle rect = new Rectangle(-1, -1, this.Width + 1, this.Height);

            //FormPath = GetRoundedRectPath(rect, 25);

            //this.Region = new Region(FormPath);

        //}

        //private GraphicsPath GetRoundedRectPath(Rectangle rect, int radius)

        //{

            //int diameter = radius;

            //Rectangle arcRect = new Rectangle(rect.Location, new Size(diameter, diameter));

            //GraphicsPath path = new GraphicsPath();  

            //path.AddArc(arcRect, 185, 90);

            //arcRect.X = rect.Right - diameter;

            //path.AddArc(arcRect, 275, 90);

            //arcRect.Y = rect.Bottom - diameter;

            //path.AddArc(arcRect, 356, 90);

            //arcRect.X = rect.Left;

            //path.AddArc(arcRect, 90, 90);

            //path.CloseFigure();

            //return path;

        //}

        //protected override void OnPaint(PaintEventArgs e)

        //{

            //base.OnPaint(e);

            //SetWindowRegion();

        //}

        private void Form1_Load(object sender, EventArgs e)

        {

            this.FormBorderStyle = FormBorderStyle.None;

        }

    }

}