Verify the Hikvision device has the correct DNS settings . Misconfigured DNS is a frequent cause of connection failures. 2. Fix Version and SDK Mismatches
[DllImport("hcnetsdk.dll")] private static extern uint NET_DVR_GetLastError(); hcnetsdk.dll 9 hikvision error
To prevent the HCNetsdk.dll 9 Hikvision error and ensure smooth operation of Hikvision devices: Verify the Hikvision device has the correct DNS settings