IOCTL_VIDEO_RESTORE_HARDWARE_STATE - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// ntddvdeo.h

// CTL_CODE(0x0023, 0x081, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_VIDEO_RESTORE_HARDWARE_STATE 0x00230204
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ni-ntddvdeo-ioctl_video_restore_hardware_state)

IOCTL_VIDEO_RESTORE_HARDWARE_STATE IOCTL

Description

Restores all values used to set the hardware registers. Miniport drivers for VGA-compatible adapters are required to support this nonmodal request; optional for other miniport drivers.

Parameters

Major code

Input buffer

The VRP InputBuffer contains the previously-saved VIDEO_HARDWARE_STATE structure.

Input buffer length

Output buffer

None

Output buffer length

Input/output buffer

Input/output buffer length

Status block

The miniport driver does not set the Information member of the STATUS_BLOCK structure.

View the official Windows Driver Kit DDI reference

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