![]() ![]() The in-box driver cannot service a button that is not wired to an interrupt line. A HID transport minidriver reports those events to upper-level drivers that then send details to HID clients in user mode or kernel mode.įor physical general-purpose I/O (GPIO) buttons, the HID transport minidriver is a Microsoft-provided in-box driver that reports the events based on the interrupts that are received on the defined GPIO hardware resources. When a button state changes, that event is mapped to a HID Usages. ![]() This allows the system to interpret the purpose and events of those buttons in a standardized way. Buttons declare themselves to the operating system as HID devices by supplying HID button report descriptors. ![]() Use the Microsoft-provided button driver for GPIO buttons otherwise, implement your driver that injects HID data to the operating system.īuttons (Power, Windows, volume and rotation lock) are typically used for tasks that occur while the physical keyboard is not available to the user, on form factors such as convertibles or slates.
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