public WinMain()
{
InitializeComponent();
m_rdn = new RegisterDeviceNotifications(this.Handle, KSCATEGORY_CAPTURE);
// Create the object that manages video preview.
m_pPreview = new CPreview(picbCapture.Handle, this.Handle);
}
private void WinMain_FormClosed(object sender, FormClosedEventArgs e)
{
m_pPreview.Dispose();
m_pPreview = null;
}