Opening and Handling Devices: Open a Video Capture Device

The sample application's window looks as follows:

First of all the instance of the Grabber class is to be created as member of the dialog class.

DShowLib::Grabber        m_cGrabber; // The instance of the Grabber class.

The video capture device will be opened in the CDialog::OnInitDialog() method. Its device name string, e.g. "DBK 21F04" is passed to Grabber::openDev(). If the video capture device has been opened successfully, i.e. it is valid, the image data stream is started by a call to Grabber::startLive().

m_cGrabber.openDev( "DBK 21F04" );

if( m_cGrabber.isDevValid())
        m_cGrabber.startLive();