using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Runtime.InteropServices;namespace WindowsFormsApplication24 { public partial class Form1 : Form { public Form1() { InitializeComponent(); }
const short WM_CAP = 1024; const int WM_CAP_DRIVER_CONNECT = WM_CAP + 10; const int WM_CAP_DRIVER_DISCONNECT = WM_CAP + 11; const int WM_CAP_EDIT_COPY = WM_CAP + 30; const int WM_CAP_SET_PREVIEW = WM_CAP + 50; const int WM_CAP_SET_PREVIEWRATE = WM_CAP + 52; const int WM_CAP_SET_SCALE = WM_CAP + 53; const int WS_CHILD = 1073741824; const int WS_VISIBLE = 268435456; const short SWP_NOMOVE = 2; const short SWP_NOSIZE = 1; const short SWP_NOZORDER = 4; const short HWND_BOTTOM = 1; int iDevice = 0; int hHwnd; [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SendMessageA")] static extern int SendMessage(int hwnd, int wMsg, int wParam, [MarshalAs(UnmanagedType.AsAny)] object lParam); [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SetWindowPos")] static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags); [System.Runtime.InteropServices.DllImport("user32")] static extern bool DestroyWindow(int hndw); [System.Runtime.InteropServices.DllImport("avicap32.dll")] static extern int capCreateCaptureWindowA(string lpszWindowName, int dwStyle, int x, int y, int nWidth, short nHeight, int hWndParent, int nID); [System.Runtime.InteropServices.DllImport("avicap32.dll")] static extern bool capGetDriverDescriptionA(short wDriver, string lpszName, int cbName, string lpszVer, int cbVer); private void OpenPreviewWindow() { int iHeight = 320; int iWidth = 200; // // Open Preview window in picturebox // hHwnd = capCreateCaptureWindowA(iDevice.ToString(), (WS_VISIBLE | WS_CHILD), 0, 0, 640, 480, picCapture.Handle.ToInt32(), 0); // // Connect to device // if (SendMessage(hHwnd, WM_CAP_DRIVER_CONNECT, iDevice, 0) == 1) { // // Set the preview scale // SendMessage(hHwnd, WM_CAP_SET_SCALE, 1, 0); // // Set the preview rate in milliseconds // SendMessage(hHwnd, WM_CAP_SET_PREVIEWRATE, 66, 0); // // Start previewing the image from the camera // SendMessage(hHwnd, WM_CAP_SET_PREVIEW, 1, 0); // // Resize window to fit in picturebox // SetWindowPos(hHwnd, HWND_BOTTOM, 0, 0, iWidth, iHeight, (SWP_NOMOVE | SWP_NOZORDER)); } else { // // Error connecting to device close window // DestroyWindow(hHwnd); } } private void ClosePreviewWindow() { // // Disconnect from device // SendMessage(hHwnd, WM_CAP_DRIVER_DISCONNECT, iDevice, 0); // // close window // DestroyWindow(hHwnd); } private void button1_Click(object sender, EventArgs e) { iDevice = int.Parse(device_number_textBox.Text); OpenPreviewWindow(); } } }
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;namespace WindowsFormsApplication24
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
const short WM_CAP = 1024;
const int WM_CAP_DRIVER_CONNECT = WM_CAP + 10;
const int WM_CAP_DRIVER_DISCONNECT = WM_CAP + 11;
const int WM_CAP_EDIT_COPY = WM_CAP + 30;
const int WM_CAP_SET_PREVIEW = WM_CAP + 50;
const int WM_CAP_SET_PREVIEWRATE = WM_CAP + 52;
const int WM_CAP_SET_SCALE = WM_CAP + 53;
const int WS_CHILD = 1073741824;
const int WS_VISIBLE = 268435456;
const short SWP_NOMOVE = 2;
const short SWP_NOSIZE = 1;
const short SWP_NOZORDER = 4;
const short HWND_BOTTOM = 1;
int iDevice = 0;
int hHwnd;
[System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SendMessageA")]
static extern int SendMessage(int hwnd, int wMsg, int wParam, [MarshalAs(UnmanagedType.AsAny)]
object lParam);
[System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SetWindowPos")]
static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags);
[System.Runtime.InteropServices.DllImport("user32")]
static extern bool DestroyWindow(int hndw);
[System.Runtime.InteropServices.DllImport("avicap32.dll")]
static extern int capCreateCaptureWindowA(string lpszWindowName, int dwStyle, int x, int y, int nWidth, short nHeight, int hWndParent, int nID);
[System.Runtime.InteropServices.DllImport("avicap32.dll")]
static extern bool capGetDriverDescriptionA(short wDriver, string lpszName, int cbName, string lpszVer, int cbVer);
private void OpenPreviewWindow()
{
int iHeight = 320;
int iWidth = 200;
//
// Open Preview window in picturebox
//
hHwnd = capCreateCaptureWindowA(iDevice.ToString(), (WS_VISIBLE | WS_CHILD), 0, 0, 640, 480, picCapture.Handle.ToInt32(), 0);
//
// Connect to device
//
if (SendMessage(hHwnd, WM_CAP_DRIVER_CONNECT, iDevice, 0) == 1)
{
//
// Set the preview scale
//
SendMessage(hHwnd, WM_CAP_SET_SCALE, 1, 0);
//
// Set the preview rate in milliseconds
//
SendMessage(hHwnd, WM_CAP_SET_PREVIEWRATE, 66, 0);
//
// Start previewing the image from the camera
//
SendMessage(hHwnd, WM_CAP_SET_PREVIEW, 1, 0);
//
// Resize window to fit in picturebox
//
SetWindowPos(hHwnd, HWND_BOTTOM, 0, 0, iWidth, iHeight, (SWP_NOMOVE | SWP_NOZORDER));
}
else
{
//
// Error connecting to device close window
//
DestroyWindow(hHwnd);
}
}
private void ClosePreviewWindow()
{
//
// Disconnect from device
//
SendMessage(hHwnd, WM_CAP_DRIVER_DISCONNECT, iDevice, 0);
//
// close window
//
DestroyWindow(hHwnd);
}
private void button1_Click(object sender, EventArgs e)
{
iDevice = int.Parse(device_number_textBox.Text);
OpenPreviewWindow();
}
}
}
谢谢高手了