C# ต้องการ capture หน้าจอ เป็น VDO ต้องทำอย่างไรครับ เริ่มไม่ถูก ^^

		private void Form1_Load(object sender, System.EventArgs e)
		{
			// set the image capture size
			this.WebCamCapture.CaptureHeight = this.pictureBox1.Height;
			this.WebCamCapture.CaptureWidth = this.pictureBox1.Width;
		}

		private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
		{
			// stop the video capture
			this.WebCamCapture.Stop();
		}

		/// <summary>
		/// An image was capture
		/// </summary>
		/// <param name="source">control raising the event</param>
		/// <param name="e">WebCamEventArgs</param>
		private void WebCamCapture_ImageCaptured(object source, WebCam_Capture.WebcamEventArgs e)
		{
			// set the picturebox picture
			this.pictureBox1.Image = e.WebCamImage;
		}

		private void cmdStart_Click(object sender, System.EventArgs e)
		{
			// change the capture time frame
			this.WebCamCapture.TimeToCapture_milliseconds = (int) this.numCaptureTime.Value;

			// start the video capture. let the control handle the
			// frame numbers.
			this.WebCamCapture.Start(0);

		}

		private void cmdStop_Click(object sender, System.EventArgs e)
		{
			// stop the video capture
			this.WebCamCapture.Stop();
		}

		private void cmdContinue_Click(object sender, System.EventArgs e)
		{
			// change the capture time frame
			this.WebCamCapture.TimeToCapture_milliseconds = (int) this.numCaptureTime.Value;

			// resume the video capture from the stop
			this.WebCamCapture.Start(this.WebCamCapture.FrameNumber);
		}
	}

#region Using directives

///kishor datta gupta
///[email protected]
///www.kishordgupta.wordpress.com

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using AviFile;
using System.Threading;
using System.IO;
#endregion
namespace ScreenCapture
{
    public partial class Form1 : Form
    {
        AviManager aviManager = new AviManager(@"..\..\Output\output.avi", false);
        int ScreenWidth = Screen.PrimaryScreen.Bounds.Width;
        int ScreenHeight = Screen.PrimaryScreen.Bounds.Height;
        VideoStream aviStream = null;
        public Form1()
        {

            InitializeComponent();
        }

        public void startrecording()
        {
                Graphics g;
                Bitmap b = new Bitmap(ScreenWidth, ScreenHeight);
                g = Graphics.FromImage(b);
                g.CopyFromScreen(Point.Empty, Point.Empty, Screen.PrimaryScreen.Bounds.Size);
                aviStream.AddFrame(b);
                b.Dispose();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Graphics g;
            Bitmap bi = new Bitmap(ScreenWidth, ScreenHeight);
            g = Graphics.FromImage(bi);
            g.CopyFromScreen(Point.Empty, Point.Empty, Screen.PrimaryScreen.Bounds.Size);
            aviStream = aviManager.AddVideoStream(true,4, bi);
            bi.Dispose(); ; ;
            timer1.Enabled = true;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            timer1.Enabled = false;
            aviManager.Close();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            startrecording();
        }
    }
}