EngUnmapEvent function (winddi.h)
The EngUnmapEvent function cleans up the kernel-mode resources allocated for a mapped user-mode event.
Syntax
ENGAPI BOOL EngUnmapEvent(
[in] PEVENT pEvent
);
Parameters
[in] pEvent
Pointer to an event object returned from a previous call to EngMapEvent.
Return value
EngUnmapEvent returns TRUE upon success. Otherwise, it returns FALSE.
Remarks
The display driver should call EngUnmapEvent when it is notified that the process (typically EngCreateDriverObj) that created the user-mode event has terminated. The display driver can also call EngUnmapEvent to perform its own cleanup. The display and miniport drivers should not touch the event object after EngUnmapEvent has been called.
The display driver can call EngUnmapEvent only for an event object returned by EngMapEvent. It must not call this function for an event object returned by EngCreateEvent.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | This function is available in Windows XP and later. |
| Target Platform | Universal |
| Header | winddi.h (include Winddi.h) |
| Library | Win32k.lib |
| DLL | Win32k.sys |