private void initFinger()
        {
            if (null == ZKFPEngX1)
            {
                //实例化OCX控件
                ZKFPEngX1 = new AxZKFPEngXControl.AxZKFPEngX();
                //显式调用该实例的CreateControl方法才能调用其它方法,否则在调用时系统将报AxHost.InvalidActiveXStateException异常
                ZKFPEngX1.CreateControl();
                //连接多个指纹采集器时,选择指纹头的序号,从0 开始;小于零时指纹采集器不工作
                ZKFPEngX1.SensorIndex = 0;
                //取得指纹初始特征
                ZKFPEngX1.OnFeatureInfo += new IZKFPEngXEvents_OnFeatureInfoEventHandler(ZKFPEngX1_OnFeatureInfo);
                ZKFPEngX1.OnEnroll      += new IZKFPEngXEvents_OnEnrollEventHandler(ZKFPEngX1_OnEnroll);
                //指纹图片接收
                ZKFPEngX1.OnImageReceived += new IZKFPEngXEvents_OnImageReceivedEventHandler(ZKFPEngX1_OnImageReceived);
                //指纹识别系统算法引擎版本号
                ZKFPEngX1.FPEngineVersion = "9";
                ZKFPEngX1.Threshold       = 5;
            }
            if (!ZKFPEngX1.EngineValid)
            {
                //初始化指纹识别系统
                int result = ZKFPEngX1.InitEngine();

                if (-2 == result)
                {
                    result = ZKFPEngX1.InitEngine();
                }
                //初始化成功
                if (0 == result)
                {
                    //创建指纹识别高速缓冲空间 并返回其句柄
                    CreateFPCacheDBEx();
                }
                else if (1 == result)
                {
                    endFinger();
                    throw new Exception("指纹识别驱动程序加载失败");
                }
                else if (2 == result)
                {
                    endFinger();
                    throw new Exception("没有连接指纹识别仪");
                }
                else
                {
                    endFinger();
                    throw new Exception("指定的指纹仪不存在");
                }
            }
            ZKFPEngX1.FlushFPImages();
        }