using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
using System.Drawing.Imaging;
namespace webcam
{
public partial class Form2 : Form
{
private int hHwnd;
public Form2()
{
InitializeComponent();
}
public struct videohdr_tag
{
public byte[] lpData;
public int dwBufferLength;
public int dwBytesUsed;
public int dwTimeCaptured;
public int dwUser;
public int dwFlags;
public int[] dwReserved;
}
public delegate bool CallBack(int hwnd, int lParam);
/// <summary>
/// 必需的設計器變量。
/// </summary>
//private System.ComponentModel.Container components = null;
[DllImport("avicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
public static extern int capCreateCaptureWindowA([MarshalAs(UnmanagedType.VBByRefStr)] ref string lpszWindowName, int dwStyle, int x, int y, int nWidth, short nHeight, int hWndParent, int nID);
[DllImport("avicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
public static extern bool capGetDriverDescriptionA(short wDriver, [MarshalAs(UnmanagedType.VBByRefStr)] ref string lpszName, int cbName, [MarshalAs(UnmanagedType.VBByRefStr)] ref string lpszVer, int cbVer);
[DllImport("user32", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
public static extern bool DestroyWindow(int hndw);
[DllImport("user32", EntryPoint = "SendMessageA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
public static extern int SendMessage(int hwnd, int wMsg, int wParam, [MarshalAs(UnmanagedType.AsAny)] object lParam);
[DllImport("user32", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
public static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags);
[DllImport("vfw32.dll")]
public static extern string capVideoStreamCallback(int hwnd, videohdr_tag videohdr_tag);
[DllImport("vicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
public static extern bool capSetCallbackOnFrame(int hwnd, string s);
private void OpenCapture()
{
int intWidth = this.panel_Vedio.Width;
int intHeight = this.panel_Vedio.Height;
int intDevice = 0;
string refDevice = intDevice.ToString();
hHwnd = Form2.capCreateCaptureWindowA(ref refDevice, 1342177280, 0, 0, 640, 480, this.panel_Vedio.Handle.ToInt32(), 0);
this.LbSysMsg.Text = "";
this.LbSysMsg.Text += "驅動:" + refDevice;
if (Form2.SendMessage(hHwnd, 0x40a, intDevice, 0) > 0)
{
Form2.SendMessage(this.hHwnd, 0x435, -1, 0);
Form2.SendMessage(this.hHwnd, 0x434, 0x42, 0);
Form2.SendMessage(this.hHwnd, 0x432, -1, 0);
Form2.SetWindowPos(this.hHwnd, 1, 0, 0, intWidth, intHeight, 6);
this.BtnCapTure.Enabled = false;
this.BtnStop.Enabled = true;
}
else
{
Form2.DestroyWindow(this.hHwnd);
this.BtnCapTure.Enabled = false;
this.BtnStop.Enabled = true;
}
}
private void BtnCapTure_Click(object sender, EventArgs e)
{
this.OpenCapture();
}
private void BtnStop_Click(object sender, EventArgs e)
{
Form2.SendMessage(this.hHwnd, 0x40b, 0, 0);
Form2.DestroyWindow(this.hHwnd);
this.BtnCapTure.Enabled=true;
this.BtnStop.Enabled=false;
}
private void button1_Click(object sender, System.EventArgs e)
{
try
{
Form2.SendMessage(this.hHwnd, 0x41e, 0, 0);
IDataObject obj1 = Clipboard.GetDataObject();
if (obj1.GetDataPresent(typeof(Bitmap)))
{
Image image1 = (Image)obj1.GetData(typeof(Bitmap));
// this.panel_Vedio.Image = image1;
// this.ClosePreviewWindow();
SaveFileDialog SaveFileDialog1 = new SaveFileDialog();
SaveFileDialog1.FileName = DateTime.Now.ToString("yyyyMMddhhmmss");
SaveFileDialog1.Filter = "Image Files(*.JPG;*.GIF)|*.JPG;*.GIF|All files (*.*)|*.*";
if (SaveFileDialog1.ShowDialog() == DialogResult.OK)
{
image1.Save(SaveFileDialog1.FileName, ImageFormat.Bmp);
}
}
}
catch
{
}
}
}
在vs2005環境下調試通過，代碼參考了csdn中部分帖子和博客
}