private void button1_Click(object sender, EventArgs e) { bool tag = HikSDK.NET_DVR_Init(); HikSDK.LPNET_DVR_DEVICEINFO_V301 dev = new HikSDK.LPNET_DVR_DEVICEINFO_V301(); user = HikSDK.NET_DVR_Login_V30("192.168.1.15", 8000, "admin", "12345", out dev);