Generated Events

Drives can communicate with the Window Server, and through that to user programs, using events.

Kern::AddEvent() adds an event to the kernel event queue. This is used typically in drivers such as the keyboard driver, which raises key events.

TRawEvent event;
event.Set(TRawEvent::EKeyDown, EStdKeyBackspace);
Kern::AddEvent(event);

The kernel event queue maintains a circular buffer of TRawEvent objects allocated at system initialization. The Windows Server calls UserSvr::CaptureEventHook() to register itself to receive such events. The Kernel does not permit any process other than the Windows Server to register to receive events.