private void OpenCapture()
{
int intWidth = this.panelCamera.Width;
int intHeight = this.panelCamera.Height;
int intDevice = 0;
string refDevice = intDevice.ToString();
//创建视频窗口并得到句柄
hHwnd = CameraForm.capCreateCaptureWindowA(ref refDevice, 1342177280, 0, 0, 640, 480, this.panelCamera.Handle.ToInt32(), 0);
if (CameraForm.SendMessage(hHwnd, 0x40a, intDevice, 0) > 0)
{ //0x435，0x434，0x432是根据前面句柄而随即定义的参数
CameraForm.SendMessage(this.hHwnd, 0x435, -1, 0); //该函数将指定的消息发送到一个或多个窗口
CameraForm.SendMessage(this.hHwnd, 0x434, 0x42, 0);
CameraForm.SendMessage(this.hHwnd, 0x432, -1, 0);
CameraForm.SetWindowPos(this.hHwnd, 1, 0, 0, intWidth, intHeight, 6);
}
else
{
CameraForm.DestroyWindow(this.hHwnd);//销毁指定的窗口。
}
}
private void btnScreenshot_Click(object sender, EventArgs e)
{
try
{
CameraForm.SendMessage(this.hHwnd, 0x41e, 0, 0);
IDataObject obj1 = Clipboard.GetDataObject();
if (obj1.GetDataPresent(typeof(Bitmap)))
{
Image image1 = (Image)obj1.GetData(typeof(Bitmap));
SaveFileDialog SaveFileDialog1 = new SaveFileDialog();
SaveFileDialog1.FileName = DateTime.Now.ToString("yyyyMMddhhmmss");//用当前的时间的字符串作为图片的名字避免重复
SaveFileDialog1.Filter = "Image Files(*.JPG;*.GIF)|*.JPG;*.GIF|All files (*.*)|*.*";
if (SaveFileDialog1.ShowDialog() == DialogResult.OK)
{
image1.Save(SaveFileDialog1.FileName, ImageFormat.Bmp);
}
}
}
catch
{
}
}
private void btnStop_Click(object sender, EventArgs e)
{
//停止视频注销视频句柄
CameraForm.SendMessage(this.hHwnd, 0x40b, 0, 0);
CameraForm.DestroyWindow(this.hHwnd);
}