IKEV2_PROJECTION_INFO

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct IKEV2_PROJECTION_INFO
{
    public uint dwIPv4NegotiationError;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)] public string wszAddress;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)] public string wszRemoteAddress;
    public ulong IPv4SubInterfaceIndex;
    public uint dwIPv6NegotiationError;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)] public byte[] bInterfaceIdentifier;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)] public byte[] bRemoteInterfaceIdentifier;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)] public byte[] bPrefix;
    public uint dwPrefixLength;
    public ulong IPv6SubInterfaceIndex;
    public uint dwOptions;
    public uint dwAuthenticationProtocol;
    public uint dwEapTypeId;
    public uint dwCompressionAlgorithm;
    public uint dwEncryptionMethod;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure IKEV2_PROJECTION_INFO
    Public dwIPv4NegotiationError As UInteger
    <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=16)> Public wszAddress As String
    <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=16)> Public wszRemoteAddress As String
    Public IPv4SubInterfaceIndex As ULong
    Public dwIPv6NegotiationError As UInteger
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=8)> Public bInterfaceIdentifier() As Byte
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=8)> Public bRemoteInterfaceIdentifier() As Byte
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=8)> Public bPrefix() As Byte
    Public dwPrefixLength As UInteger
    Public IPv6SubInterfaceIndex As ULong
    Public dwOptions As UInteger
    Public dwAuthenticationProtocol As UInteger
    Public dwEapTypeId As UInteger
    Public dwCompressionAlgorithm As UInteger
    Public dwEncryptionMethod As UInteger
End Structure

import ctypes
from ctypes import wintypes

class IKEV2_PROJECTION_INFO(ctypes.Structure):
    _fields_ = [
        ("dwIPv4NegotiationError", wintypes.DWORD),
        ("wszAddress", ctypes.c_wchar * 16),
        ("wszRemoteAddress", ctypes.c_wchar * 16),
        ("IPv4SubInterfaceIndex", ctypes.c_ulonglong),
        ("dwIPv6NegotiationError", wintypes.DWORD),
        ("bInterfaceIdentifier", ctypes.c_ubyte * 8),
        ("bRemoteInterfaceIdentifier", ctypes.c_ubyte * 8),
        ("bPrefix", ctypes.c_ubyte * 8),
        ("dwPrefixLength", wintypes.DWORD),
        ("IPv6SubInterfaceIndex", ctypes.c_ulonglong),
        ("dwOptions", wintypes.DWORD),
        ("dwAuthenticationProtocol", wintypes.DWORD),
        ("dwEapTypeId", wintypes.DWORD),
        ("dwCompressionAlgorithm", wintypes.DWORD),
        ("dwEncryptionMethod", wintypes.DWORD),
    ]

#[repr(C)]
pub struct IKEV2_PROJECTION_INFO {
    pub dwIPv4NegotiationError: u32,
    pub wszAddress: [u16; 16],
    pub wszRemoteAddress: [u16; 16],
    pub IPv4SubInterfaceIndex: u64,
    pub dwIPv6NegotiationError: u32,
    pub bInterfaceIdentifier: [u8; 8],
    pub bRemoteInterfaceIdentifier: [u8; 8],
    pub bPrefix: [u8; 8],
    pub dwPrefixLength: u32,
    pub IPv6SubInterfaceIndex: u64,
    pub dwOptions: u32,
    pub dwAuthenticationProtocol: u32,
    pub dwEapTypeId: u32,
    pub dwCompressionAlgorithm: u32,
    pub dwEncryptionMethod: u32,
}

import "golang.org/x/sys/windows"

type IKEV2_PROJECTION_INFO struct {
	dwIPv4NegotiationError uint32
	wszAddress [16]uint16
	wszRemoteAddress [16]uint16
	IPv4SubInterfaceIndex uint64
	dwIPv6NegotiationError uint32
	bInterfaceIdentifier [8]byte
	bRemoteInterfaceIdentifier [8]byte
	bPrefix [8]byte
	dwPrefixLength uint32
	IPv6SubInterfaceIndex uint64
	dwOptions uint32
	dwAuthenticationProtocol uint32
	dwEapTypeId uint32
	dwCompressionAlgorithm uint32
	dwEncryptionMethod uint32
}

type
  IKEV2_PROJECTION_INFO = record
    dwIPv4NegotiationError: DWORD;
    wszAddress: array[0..15] of WideChar;
    wszRemoteAddress: array[0..15] of WideChar;
    IPv4SubInterfaceIndex: UInt64;
    dwIPv6NegotiationError: DWORD;
    bInterfaceIdentifier: array[0..7] of Byte;
    bRemoteInterfaceIdentifier: array[0..7] of Byte;
    bPrefix: array[0..7] of Byte;
    dwPrefixLength: DWORD;
    IPv6SubInterfaceIndex: UInt64;
    dwOptions: DWORD;
    dwAuthenticationProtocol: DWORD;
    dwEapTypeId: DWORD;
    dwCompressionAlgorithm: DWORD;
    dwEncryptionMethod: DWORD;
  end;

const IKEV2_PROJECTION_INFO = extern struct {
    dwIPv4NegotiationError: u32,
    wszAddress: [16]u16,
    wszRemoteAddress: [16]u16,
    IPv4SubInterfaceIndex: u64,
    dwIPv6NegotiationError: u32,
    bInterfaceIdentifier: [8]u8,
    bRemoteInterfaceIdentifier: [8]u8,
    bPrefix: [8]u8,
    dwPrefixLength: u32,
    IPv6SubInterfaceIndex: u64,
    dwOptions: u32,
    dwAuthenticationProtocol: u32,
    dwEapTypeId: u32,
    dwCompressionAlgorithm: u32,
    dwEncryptionMethod: u32,
};

type
  IKEV2_PROJECTION_INFO {.bycopy.} = object
    dwIPv4NegotiationError: uint32
    wszAddress: array[16, uint16]
    wszRemoteAddress: array[16, uint16]
    IPv4SubInterfaceIndex: uint64
    dwIPv6NegotiationError: uint32
    bInterfaceIdentifier: array[8, uint8]
    bRemoteInterfaceIdentifier: array[8, uint8]
    bPrefix: array[8, uint8]
    dwPrefixLength: uint32
    IPv6SubInterfaceIndex: uint64
    dwOptions: uint32
    dwAuthenticationProtocol: uint32
    dwEapTypeId: uint32
    dwCompressionAlgorithm: uint32
    dwEncryptionMethod: uint32

struct IKEV2_PROJECTION_INFO
{
    uint dwIPv4NegotiationError;
    wchar[16] wszAddress;
    wchar[16] wszRemoteAddress;
    ulong IPv4SubInterfaceIndex;
    uint dwIPv6NegotiationError;
    ubyte[8] bInterfaceIdentifier;
    ubyte[8] bRemoteInterfaceIdentifier;
    ubyte[8] bPrefix;
    uint dwPrefixLength;
    ulong IPv6SubInterfaceIndex;
    uint dwOptions;
    uint dwAuthenticationProtocol;
    uint dwEapTypeId;
    uint dwCompressionAlgorithm;
    uint dwEncryptionMethod;
}