手写代码实现窗体的拖动效果

    public partial class Form1 : Form
    {
        private Point oldPoint = new Point(0,0);
        public Form1()
        {
            InitializeComponent();
        }

        private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            this.Close();
        }

        private void linkLabel2_MouseDown(object sender, MouseEventArgs e)
        {
            oldPoint.X = Cursor.Position.X;
            oldPoint.Y = Cursor.Position.Y;
        }

        private void linkLabel2_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                int offset_x = Cursor.Position.X-oldPoint.X;
                int offset_y = Cursor.Position.Y -oldPoint.Y;
                this.Location = new Point(this.Location.X + offset_x, this.Location.Y + offset_y);
                oldPoint.X = Cursor.Position.X;
                oldPoint.Y = Cursor.Position.Y;
            }
        }
    }