The face data to be applied and linked with card should be collected first via face capture module of access control device.
Make sure you have called NET_DVR_Init to initialize the development resources.
Make sure you have called NET_DVR_Login_V40 to log in to device.
Figure 1 Programming Flow of Collecting Face DataCall NET_DVR_Logout and NET_DVR_Cleanup to log out and release the resource.