【IT168技术文档】

  现在很多摄像头都是无驱动的，这种方法我试验没有成功，不知道各位高人有没有这方面的经验，网上也一直再问如何做视频录像，有知道的朋友麻烦给个参考地址。
文章最后提供了一个这个小程序的下载

  (1)安装摄像头后，一般可以找到一个avicap32.dll文件,里面有一些操作摄像头的方法。
  (2)这是一个关于摄像头的类:

using System;
using System.Runtime.InteropServices;
namespace webcam
{
/**////
/// avicap 的摘要说明。
/// 
 public class showVideo
{
// showVideo calls
  [DllImport("avicap32.dll")]
public static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID);
[DllImport("avicap32.dll")]
public static extern bool capGetDriverDescriptionA(short wDriver, byte[] lpszName, int cbName, byte[] lpszVer, int cbVer);
[DllImport("User32.dll")]
public static extern bool SendMessage(IntPtr hWnd, int wMsg, bool wParam, int lParam);
[DllImport("User32.dll")]
public static extern bool SendMessage(IntPtr hWnd, int wMsg, short wParam, int lParam);
[DllImport("User32.dll")]
public static extern bool SendMessage(IntPtr hWnd, int wMsg, short wParam, FrameEventHandler lParam);
[DllImport("User32.dll")]
public static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, ref BITMAPINFO lParam);
[DllImport("User32.dll")]
public static extern int SetWindowPos(IntPtr hWnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags);
[DllImport("avicap32.dll")]
public static extern int capGetVideoFormat(IntPtr hWnd, IntPtr psVideoFormat, int wSize );
// Constants
  public const int WM_USER = 0x400;
public const int WS_CHILD = 0x40000000;
public const int WS_VISIBLE = 0x10000000;
public const int SWP_NOMOVE = 0x2;
public const int SWP_NOZORDER = 0x4;
public const int WM_CAP_DRIVER_CONNECT = WM_USER + 10;
public const int WM_CAP_DRIVER_DISCONNECT = WM_USER + 11;
public const int WM_CAP_SET_CALLBACK_FRAME = WM_USER + 5;
public const int WM_CAP_SET_PREVIEW = WM_USER + 50;
public const int WM_CAP_SET_PREVIEWRATE = WM_USER + 52;
public const int WM_CAP_SET_VIDEOFORMAT = WM_USER + 45;
// Structures
  [StructLayout(LayoutKind.Sequential)] public struct VIDEOHDR
{
[MarshalAs(UnmanagedType.I4)] public int lpData;
[MarshalAs(UnmanagedType.I4)] public int dwBufferLength;
[MarshalAs(UnmanagedType.I4)] public int dwBytesUsed;
[MarshalAs(UnmanagedType.I4)] public int dwTimeCaptured;
[MarshalAs(UnmanagedType.I4)] public int dwUser;
[MarshalAs(UnmanagedType.I4)] public int dwFlags;
[MarshalAs(UnmanagedType.ByValArray, SizeConst=4)] public int[] dwReserved;
}
[StructLayout(LayoutKind.Sequential)] public struct BITMAPINFOHEADER
{
[MarshalAs(UnmanagedType.I4)] public Int32 biSize ;
[MarshalAs(UnmanagedType.I4)] public Int32 biWidth ;
[MarshalAs(UnmanagedType.I4)] public Int32 biHeight ;
[MarshalAs(UnmanagedType.I2)] public short biPlanes;
[MarshalAs(UnmanagedType.I2)] public short biBitCount ;
[MarshalAs(UnmanagedType.I4)] public Int32 biCompression;
[MarshalAs(UnmanagedType.I4)] public Int32 biSizeImage;
[MarshalAs(UnmanagedType.I4)] public Int32 biXPelsPerMeter;
[MarshalAs(UnmanagedType.I4)] public Int32 biYPelsPerMeter;
[MarshalAs(UnmanagedType.I4)] public Int32 biClrUsed;
[MarshalAs(UnmanagedType.I4)] public Int32 biClrImportant;
}
[StructLayout(LayoutKind.Sequential)] public struct BITMAPINFO
{
[MarshalAs(UnmanagedType.Struct, SizeConst=40)] public BITMAPINFOHEADER bmiHeader;
[MarshalAs(UnmanagedType.ByValArray, SizeConst=1024)] public Int32[] bmiColors;
}
public delegate void FrameEventHandler(IntPtr lwnd, IntPtr lpVHdr);
// Public methods
  public static object GetStructure(IntPtr ptr,ValueType structure)
{
return Marshal.PtrToStructure(ptr,structure.GetType());
}
public static object GetStructure(int ptr,ValueType structure)
{
return GetStructure(new IntPtr(ptr),structure);
}
public static void Copy(IntPtr ptr,byte[] data)
{
Marshal.Copy(ptr,data,0,data.Length);
}
public static void Copy(int ptr,byte[] data)
{
Copy(new IntPtr(ptr),data);
}
public static int SizeOf(object structure)
{
return Marshal.SizeOf(structure);
}
}
//Web Camera Class
 public class WebCamera
{
// Constructur
  public WebCamera(IntPtr handle, int width,int height)
{
mControlPtr = handle;
mWidth = width;
mHeight = height;
}