public Form1()
        {
            InitializeComponent();

            InitForms();

            m_Image            = Marshal.AllocHGlobal(256 * 1024);
            m_IdentifyCallback = new IdentifyCallback(identifyCallback);
            m_EnrollCallback   = new EnrollCallback(enrollCallback);

            UF_SetIdentifyCallback(m_IdentifyCallback);
            UF_SetEnrollCallback(m_EnrollCallback);

            UF_SetReceiveRawDataCallback(new RawDataCallback(rawDataCallback));
        }
 static extern void UF_SetEnrollCallback(EnrollCallback callback);