// ntddvdeo.h

// CTL_CODE(0x0023, 0x100, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_VIDEO_QUERY_AVAIL_MODES 0x00230400
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Windows Driver Kit DDI reference (ni-ntddvdeo-ioctl_video_query_avail_modes)

IOCTL_VIDEO_QUERY_AVAIL_MODES IOCTL

Description

Returns information about each video mode supported by the adapter. Miniport drivers are required to support this nonmodal request.

Parameters

Major code

Input buffer

None

Input buffer length

Output buffer

The miniport driver returns an array of VIDEO_MODE_INFORMATION structures in the VRP OutputBuffer.

Output buffer length

Input/output buffer

Input/output buffer length

Status block

If the miniport driver successfully returns the available modes, it sets the Information member of the STATUS_BLOCK structure to (sizeof(VIDEO_MODE_INFORMATION) * NumberOfSupportedModes); otherwise, the miniport driver sets this member to zero.

IOCTL_VIDEO_QUERY_AVAIL_MODES - NtDoc