NativeTest project is a simple command-line interface for calling Windows NT native API functions. These functions are the basic API for Windows NT, and the Win32 API calls functions in the native API to perform its work. This project is focused on providing an interface to call the system calls. The project consists of a NativeApi static library that provides the class interface for calling the functions, which reside in ntdll.dll. The second part of the project is the command-line utility that parses input and calls the functions in the static library.