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I have check camera connect to pc very good.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using OpenCVDotNet;

namespace WindowsApplication6
    public partial class Form1 : Form
        private CVCapture capture;
        public Form1()

        private void Form1_Load(object sender, EventArgs e)
            capture = new CVCapture(0);// when  debug i see signal light camera

        private void timer1_Tick(object sender, EventArgs e)
            using (CVImage nextFrame = capture.QueryFrame())// why nextFrame set null? 

                    if (nextFrame == null) capture.Restart();
                    selectPictureBox1.Image = nextFrame.ToBitmap();

        private void button1_Click(object sender, EventArgs e)
            timer1.Enabled = !(timer1.Enabled);

// I click mouse on "My Computer" icon. Then I double click on "USB Video Device #2". I see my picture. Its mean my camera has work.
My problem why nextFrame set null value.???
please help me! Thanks!
Updated 2-Nov-11 19:09pm
Md. Rashim Uddin 3-Nov-11 4:23am    
Coz it does not get the file handle of the file.

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