.net创建activex实现摄像头拍照

using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

// 有关程序集的常规信息通过以下
// 特性集控制。更改这些特性值可修改
// 与程序集关联的信息。
[assembly: AssemblyTitle("TestActiveX")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("TestActiveX")]
[assembly: AssemblyCopyright("Copyright ©  2014")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]

// 将 ComVisible 设置为 false 使此程序集中的类型
// 对 COM 组件不可见。如果需要从 COM 访问此程序集中的类型，
// 则将该类型上的 ComVisible 特性设置为 true。
[assembly: ComVisible(true)]

// 如果此项目向 COM 公开，则下列 GUID 用于类型库的 ID
[assembly: Guid("0914bbdc-9ef9-4373-951d-d8c0a2b28348")]
[assembly:System.Security.AllowPartiallyTrustedCallers()]
// 程序集的版本信息由下面四个值组成:
//
//      主版本
//      次版本 
//      生成号
//      修订号
//
// 可以指定所有这些值，也可以使用“生成号”和“修订号”的默认值，
// 方法是按如下所示使用“*”:
// [assembly: AssemblyVersion("1.0.*")]
[assembly: AssemblyVersion("1.0.0.0")]
[assembly: AssemblyFileVersion("1.0.0.0")]

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace TestActiveX
{
    //Guid唯一，不可变更，否则将无法通过IE浏览器的ActiveX控件的安全认证   
    [ComImport, Guid("CB5BDC81-93C1-11CF-8F20-00805F2CD064")]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    public interface IObjectSafety
    {
        [PreserveSig]
        void GetInterfacceSafyOptions(
        int riid,
        out int pdwSupportedOptions,
        out int pdwEnabledOptions);

        [PreserveSig]
        void SetInterfaceSafetyOptions(
        int riid,
        int dwOptionsSetMask,
        int dwEnabledOptions);
    }
}

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace TestActiveX
{
    public class WebCam
    {
        #region 参数
        private const int WM_USER = 0x400;
        private const int WS_CHILD = 0x40000000;
        private const int WS_VISIBLE = 0x10000000;
        private const int WM_CAP_START = WM_USER;
        private const int WM_CAP_STOP = WM_CAP_START + 68;
        private const int WM_CAP_DRIVER_CONNECT = WM_CAP_START + 10;
        private const int WM_CAP_DRIVER_DISCONNECT = WM_CAP_START + 11;
        private const int WM_CAP_SAVEDIB = WM_CAP_START + 25;
        private const int WM_CAP_GRAB_FRAME = WM_CAP_START + 60;
        private const int WM_CAP_SEQUENCE = WM_CAP_START + 62;
        private const int WM_CAP_FILE_SET_CAPTURE_FILEA = WM_CAP_START + 20;
        private const int WM_CAP_SEQUENCE_NOFILE = WM_CAP_START + 63;
        private const int WM_CAP_SET_OVERLAY = WM_CAP_START + 51;
        private const int WM_CAP_SET_PREVIEW = WM_CAP_START + 50;
        private const int WM_CAP_SET_CALLBACK_VIDEOSTREAM = WM_CAP_START + 6;
        private const int WM_CAP_SET_CALLBACK_ERROR = WM_CAP_START + 2;
        private const int WM_CAP_SET_CALLBACK_STATUSA = WM_CAP_START + 3;
        private const int WM_CAP_SET_CALLBACK_FRAME = WM_CAP_START + 5;
        private const int WM_CAP_SET_SCALE = WM_CAP_START + 53;
        private const int WM_CAP_SET_PREVIEWRATE = WM_CAP_START + 52;
        private IntPtr hWndC;
        private bool bStat = false;

        private IntPtr mControlPtr;
        private int mWidth;
        private int mHeight;
        private int mLeft;
        private int mTop;
        private string GrabImagePath = "";
        private string KinescopePath = "";
        #endregion

        /// <summary>
        /// 初始化摄像头
        /// </summary>
        /// <param name="handle">控件的句柄</param>
        /// <param name="left">开始显示的左边距</param>
        /// <param name="top">开始显示的上边距</param>
        /// <param name="width">要显示的宽度</param>
        /// <param name="height">要显示的长度</param>
        public WebCam(IntPtr handle, int left, int top, int width, int height)
        {
            mControlPtr = handle;
            mWidth = width;
            mHeight = height;
            mLeft = left;
            mTop = top;
        }

        #region "属性设置"
        /// <summary>
        /// 视频左边距
        /// </summary>
        public int Left
        {
            get { return mLeft; }
            set { mLeft = value; }
        }

        /// <summary>
        /// 视频上边距
        /// </summary>
        public int Top
        {
            get { return mTop; }
            set { mTop = value; }
        }

        /// <summary>
        /// 视频宽度
        /// </summary>
        public int Width
        {
            get { return mWidth; }
            set { mWidth = value; }
        }

        /// <summary>
        /// 视频高度
        /// </summary>
        public int Height
        {
            get { return mHeight; }
            set { mHeight = value; }
        }

        /// <summary>
        /// 抓图文件存放路径
        /// 例：d:a.bmp
        /// </summary>
        public string grabImagePath
        {
            get { return GrabImagePath; }
            set { GrabImagePath = value; }
        }

        /// <summary>
        /// 录像文件存放路径
        /// 例：d:a.avi
        /// </summary>
        public string kinescopePath
        {
            get { return KinescopePath; }
            set { KinescopePath = value; }
        }
        #endregion

        [DllImport("avicap32.dll")]
        private static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID);

        [DllImport("avicap32.dll")]
        private static extern int capGetVideoFormat(IntPtr hWnd, IntPtr psVideoFormat, int wSize);
        [DllImport("User32.dll")]
        private static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, long lParam);

        /// <summary>
        /// 开始显示图像
        /// </summary>
        public void Start()
        {
            if (bStat)
                return;

            bStat = true;
            byte[] lpszName = new byte[100];

            hWndC = capCreateCaptureWindowA(lpszName, WS_CHILD | WS_VISIBLE, mLeft, mTop, mWidth, mHeight, mControlPtr, 0);

            if (hWndC.ToInt32() != 0)
            {
                SendMessage(hWndC, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
                SendMessage(hWndC, WM_CAP_SET_CALLBACK_ERROR, 0, 0);
                SendMessage(hWndC, WM_CAP_SET_CALLBACK_STATUSA, 0, 0);
                SendMessage(hWndC, WM_CAP_DRIVER_CONNECT, 0, 0);
                SendMessage(hWndC, WM_CAP_SET_SCALE, 1, 0);
                SendMessage(hWndC, WM_CAP_SET_PREVIEWRATE, 66, 0);
                SendMessage(hWndC, WM_CAP_SET_OVERLAY, 1, 0);
                SendMessage(hWndC, WM_CAP_SET_PREVIEW, 1, 0);
            }
            return;
        }

        /// <summary>
        /// 停止显示
        /// </summary>
        public void Stop()
        {
            SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0);
            bStat = false;
        }

        /// <summary>
        /// 抓图
        /// </summary>
        public void GrabImage()
        {
            IntPtr hBmp = Marshal.StringToHGlobalAnsi(GrabImagePath);
            SendMessage(hWndC, WM_CAP_SAVEDIB, 0, hBmp.ToInt64());
        }

        /// <summary>
        /// 录像
        /// </summary>
        public void Kinescope()
        {
            IntPtr hBmp = Marshal.StringToHGlobalAnsi(KinescopePath);
            SendMessage(hWndC, WM_CAP_FILE_SET_CAPTURE_FILEA, 0, hBmp.ToInt64());
            SendMessage(hWndC, WM_CAP_SEQUENCE, 0, 0);
        }

        /// <summary>
        /// 停止录像
        /// </summary>
        public void StopKinescope()
        {
            SendMessage(hWndC, WM_CAP_STOP, 0, 0);
        }

    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace TestActiveX
{
    [Guid("412DE68D-3082-4C67-83FC-DBFBBFA9597B"), ComVisible(true)]
    public partial class MyActiveXControl : UserControl, IObjectSafety
    {
        #region IObjectSafety 成员 用于ActiveX控件安全信任
        public void GetInterfacceSafyOptions(int riid, out int pdwSupportedOptions, out int pdwEnabledOptions)
        {
            pdwSupportedOptions = 1;
            pdwEnabledOptions = 2;
        }

        public void SetInterfaceSafetyOptions(int riid, int dwOptionsSetMask, int dwEnabledOptions)
        {
            throw new NotImplementedException();
        }
        #endregion

        /// <summary>
        /// 摄像头驱动对象
        /// </summary>
        public WebCam webCame = null;

        public MyActiveXControl()
        {
            InitializeComponent();

            //开启摄像头
            start();
        }

        private void start()
        {
            //以panel1为容器显示视频内容
            webCame = new WebCam(panel1.Handle, 0, 0, this.panel1.Width, this.panel1.Height);
            webCame.Start();
        }

        /// <summary>
        /// 开启摄像头
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnStart_Click(object sender, EventArgs e)
        {
            webCame.Start();
        }

        /// <summary>
        /// 停止摄像头
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnStop_Click(object sender, EventArgs e)
        {
            webCame.Stop();
        }

        /// <summary>
        /// 截图
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnSave_Click(object sender, EventArgs e)
        {
            saveFileDialog1.Filter = "JPEG图片(*.jpg)|*.jpg";
            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                webCame.grabImagePath = saveFileDialog1.FileName;
                webCame.GrabImage();
            }
        }
    }
}

<html>
<title>Powered by 饕餮 www.easyyh.com</title>
<head>
</head>
<body>
<div>
<object id="yyzq" classid="clsid:412DE68D-3082-4C67-83FC-DBFBBFA9597B"
        width="523"
        height="323" >
</object>
</div>
</body>
</html>

http://files.cnblogs.com/12taotie21/TestActiveX.rar