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 窗体图片
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            this.Close();
        }
        private Point mouseOffset;//记录鼠标指针的坐标
        private bool isMouseDown;//记录鼠标左键是否按下

        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            int xOffset;
            int yOffset;
            if (e.Button == MouseButtons.Left)
            {
                xOffset = -e.X - SystemInformation.FrameBorderSize.Width;
                yOffset = -e.Y - SystemInformation.CaptionHeight - SystemInformation.FrameBorderSize.Height;

                mouseOffset = new Point(xOffset ,yOffset );
                isMouseDown = true;
            }
        }

        private void Form1_MouseMove(object sender, MouseEventArgs e)
        {
            if(isMouseDown )
            {//获取鼠标的位置
                Point mousePos = Control.MousePosition;
                mousePos.Offset(mouseOffset.X ,mouseOffset .Y );
                Location = mousePos;
            }     
        }

              
    }
}