//这个是组件类
        public SmsClientClass sms = null;

        private void Form1_Load(object sender, EventArgs e) {
            this.btnLogin.Enabled = false;
            this.btnBalance.Enabled = false;
            sms = new SmsClientClass();
            //这里不会报错
            sms.OnConnect += new ISmsClientEvents_OnConnectEventHandler(onConnect);
            //这里就会出错（异常来自 HRESULT:0x80040202）
            //如果注释了上面的,这句就没错下句就会抱这个错，好像就能用一个事件
            sms.OnLoginAccept += new ISmsClientEvents_OnLoginAcceptEventHandler(onLoginResp);
            sms.OnUserInfoAck += new ISmsClientEvents_OnUserInfoAckEventHandler(OnUserInfoAck);
            sms.OnSmsBatchAck += new ISmsClientEvents_OnSmsBatchAckEventHandler(onSendAck);
        }