// ntifs.h

typedef struct _WIM_PROVIDER_UPDATE_OVERLAY_INPUT {
  LARGE_INTEGER DataSourceId;
  ULONG         WimFileNameOffset;
  ULONG         WimFileNameLength;
} WIM_PROVIDER_UPDATE_OVERLAY_INPUT, *PWIM_PROVIDER_UPDATE_OVERLAY_INPUT;
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Windows Driver Kit DDI reference (ns-ntifs-_wim_provider_update_overlay_input)

WIM_PROVIDER_UPDATE_OVERLAY_INPUT structure

Description

The current Windows Image File (WIM) data source is updated with a new WIM file using the FSCTL_UPDATE_OVERLAY control request with a WIM_PROVIDER_UPDATE_OVERLAY_INPUT structure.

Members

`DataSourceId`

An identifier value for the WIM file data source to update.

`WimFileNameOffset`

The offset, in bytes, from the beginning of this structure of the file name for the WIM file to add as a backing source. The file name is a string of WCHAR character values.

`WimFileNameLength`

The length, in bytes, of the file name at found at WimFileNameOffset.

Remarks

The WIM file name is included immediately following WIM_PROVIDER_UPDATE_OVERLAY_INPUT in the system buffer for a FSCTL_UPDATE_OVERLAY control request. The WimFileNameOffset member is set to sizeof(WIM_PROVIDER_UPDATE_OVERLAY_INPUT).

The WIM file name includes a terminating NULL character. WimFileNameLength contains the length of the file name excluding the terminating NULL.

WIM_PROVIDER_UPDATE_OVERLAY_INPUT - NtDoc