SourceUSB supplies context sensitive help for many program features and has an extensive User's Guide in Html-Help format.

The Html-Help file can also serve as a reference to URBs, USB internal ioctls, Hub-Bus interface functions, and Miniport-Usbport interface functions. For log entries which refer to one of these request or function types, the help system's reference page can be displayed using the context menu's "Help on ..." command.