Libusb

libusb is a C library that gives applications easy access to USB devices on many different operating systems. libusb is an open source project, the code is licensed under the ​GNU Lesser General Public License version 2.1 or later.

Favorite site

• libusb website
• USB Communication Using Qt
• Stackoverflow: USB Programming with Qt

Guide

• Win32 USB API 사용하기 ¹

References