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.Drawing.Drawing2D;
using System.Drawing.Imaging;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            pictureBox1.Image = bmp;
            timer1.Interval = 10;
            timer1.Enabled = true;
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            this.hogehoge();
        }
        Bitmap bmp = new Bitmap(100, 100, PixelFormat.Format32bppArgb);
        private void hogehoge()
        {
            Rectangle rc = new Rectangle(Cursor.Position.X, Cursor.Position.Y, 100, 100);
            using (Graphics g = Graphics.FromImage(bmp))
            {
                g.CopyFromScreen(rc.X, rc.Y, 0, 0,
                  rc.Size, CopyPixelOperation.SourceCopy);
            }
            pictureBox1.Invalidate();
        }
    }
}