IDTech Windows SDK Guide  1.2.100.0
API reference for UniPay 1.5
Initialize UniPay 1.5

A Singleton instance has been established in the IDT_UniPayI_V class. Establish the callback, and then access the UniPayI_V through USB via the SharedController instance.

public MainPage()
{
this.InitializeComponent();
IDT_UniPayI_V.setCallback(MessageCallBack);
}