// ntddsysenv.h

typedef struct _XVARIABLE_NAME_AND_VALUE {
  ULONG NextEntryOffset;
  ULONG ValueOffset;
  ULONG ValueLength;
  ULONG Attributes;
  GUID  VendorGuid;
  WCHAR Name[ANYSIZE_ARRAY];
} XVARIABLE_NAME_AND_VALUE, *PXVARIABLE_NAME_AND_VALUE;
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Windows Driver Kit DDI reference (ns-ntddsysenv-_xvariable_name_and_value)

_XVARIABLE_NAME_AND_VALUE structure

Description

Stores the name and value of a system environment variable using SysEnv device. This structure is used in the IOCTL_SYSENV_ENUM_VARIABLES and IOCTL_SYSENV_SET_VARIABLE requests.

Members

`NextEntryOffset`

The location of the next entry in the array of XVARIABLE_NAME structures reprieved by the IOCTL_SYSENV_ENUM_VARIABLES request.

`ValueOffset`

The value of the system environment variable.

`ValueLength`

The length of the value.

`Attributes`

Attributes of the system environment variable.

`VendorGuid`

The vendor GUID.

`Name`

Name of the system environment variable.

XVARIABLE_NAME_AND_VALUE - NtDoc