IDTech Windows SDK Guide  1.2.177.4
API reference for NEO2
Initialize NEO2:

A Singleton instance has been established in the IDT_NEO2 class. Establish the callback, and then access the NEO2 through USB via the SharedController instance. Or, you can establish through Serial Port or IP if available for your device

public NEO2_Simple_Demo()
{
InitializeComponent();
IDT_NEO2.setCallbackIP(MessageCallBack);
IDT_NEO2.useUSB(); //connect via USB
// bool isConnected = IDT_NEO2.useSerialPort(1); //use serial port 1
// IDT_NEO2.ip_connectToSocket("10.0.1.1"); //connect to socket 10.0.1.1
}