This refers to the Filter Driver mode, which allows libusb-win32 to act as a "filter" on top of an existing vendor driver. This means you can use the original device driver while simultaneously accessing the device via libusb .
If you are a developer, hobbyist, or technician working with custom USB hardware on Windows, you have likely encountered the need for a versatile, open-source driver solution. The file is one of the most stable and widely used packages in this domain.
While 1.2.6.0 is an older, mature version (initially released around 2012, though still widely used in 2024/2025), it introduced crucial fixes that distinguish it from the 0.1.x series. Key improvements included: libusb-win32 - SourceForge