Instead of dealing with manual P/Invoke statements, add a reference to libzkfpcsharp.dll in your project or install a community-optimized wrapper via NuGet like ZkTecoFingerPrint .
Establishing a stable connection between the operating system and the optical sensor. Image Capture: libzkfpdll full
In essence, any Windows application that can read a fingerprint is very likely using libzkfp.dll (or a derivative like libzkfpcsharp.dll for .NET) under the hood. Instead of dealing with manual P/Invoke statements, add
The file is a critical dynamic-link library used in the ZKTeco ZKFinger SDK . It provides the core functions for interfacing with biometric hardware, such as the ZK9500, ZK6500, and SLK20R fingerprint scanners. such as the ZK9500
: Captures raw data and templates from the sensor.