nc-ks-pfnksdevicesetpower.md

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NC:ks.PFNKSDEVICESETPOWER	PFNKSDEVICESETPOWER (ks.h)	AVStream calls a minidriver's AVStrMiniDeviceSetPower routine when it receives an IRP_MN_SET_POWER.	stream\avstrminidevicesetpower.htm	stream	04/23/2018	PFNKSDEVICESETPOWER callback function	AVStrMiniDeviceSetPower, AVStrMiniDeviceSetPower routine [Streaming Media Devices], PFNKSDEVICESETPOWER, avstclbk_8b833d83-a199-44a9-97b8-c4afc624d6d5.xml, ks/AVStrMiniDeviceSetPower, stream.avstrminidevicesetpower	ks.h	Ks.h	Desktop	Available in Microsoft Windows XP and later operating systems and DirectX 8.0 and later DirectX versions.														Windows		PFNKSDEVICESETPOWER ks/PFNKSDEVICESETPOWER	APIRef kbSyntax	UserDefined	ks.h	PFNKSDEVICESETPOWER

PFNKSDEVICESETPOWER callback function

-description

AVStream calls a minidriver's AVStrMiniDeviceSetPower routine when it receives an IRP_MN_SET_POWER.

-parameters

-param Device [in]

Pointer to the KSDEVICE structure that received the IRP_MN_SET_POWER.

-param Irp [in]

The IRP_MN_SET_POWER issued by Device.

-param To [in]

The target device power state.

-param From [in]

The current device power state.

-remarks

If a driver has registered its device for idle detection, the power manager sends an IRP_MN_SET_POWER to change the power state of an idle device.

The minidriver specifies this routine's address in the SetPower member of its KSDEVICE_DISPATCH structure.

This routine is optional.

-see-also

IRP_MN_SET_POWER

KSDEVICE_DISPATCH