The VideoPortEnumerateChildren function allows a video miniport driver to force a reenumeration of its child devices.
VIDEOPORT_API VP_STATUS VideoPortEnumerateChildren( IN PVOID HwDeviceExtension, IN PVOID Reserved );
Pointer to the miniport driver's device extension.
Must be set to NULL.
VideoPortEnumerateChildren returns NO_ERROR.
Some devices generate an interrupt when new hardware is connected to the system, or when existing hardware is disconnected from the system. For these devices, VideoPortEnumerateChildren can make such system changes as seamless as possible. The following is one possible scenario that forces the reenumeration of child devices through VideoPortEnumerateChildren:
- New hardware is connected, which generates an interrupt.
- The miniport driver's interrupt handler (HwVidInterrupt) queues a DPC routine (HwVidDpcRoutine) by calling VideoPortQueueDpc.
- The asynchronously executed DPC contains a call to VideoPortEnumerateChildren.
|Minimum supported client||Available in Windows 2000 and later versions of the Windows operating systems.|
|Header||video.h (include Video.h)|