Microsoft Windows CE 3.0  

USB System Software

Important:
This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.

USB system software consists of two layers: an upper layer of USB device drivers and a lower layer of USB functions that are implemented by Windows CE. USB device drivers use the USB functions to establish connections to the devices they control and to configure and communicate with the devices. The lower layer of USB functions performs several interrelated tasks: