Develop RealTimeEvent using zkemkeeper.dll for multi thread IP

Im looking for a coder that have skill to create a tool in C# programming to handle multi thread IP of ZK Biometric. I know about SDK of ZK Biometric can be provide the RealTimeEvent from Attendance Machine. But on the SDK Demo software, its only available for one IP only. So, we need to create new interface / modified it is OK, to be able to make it available for multi IP. I have create another one, but the result is only one IP that work, and another real time from another machine is not work. Please provide me a demo before I chose the winner. I will try the demo for multiple machine IP that I have now. Regard,