RASDIALEXTENSIONS

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, Pack = 4, CharSet = CharSet.Unicode)]
public struct RASEAPINFO
{
    public uint dwSizeofEapInfo;
    public IntPtr pbEapInfo;
}

[StructLayout(LayoutKind.Sequential, Pack = 4, CharSet = CharSet.Unicode)]
public struct RASDEVSPECIFICINFO
{
    public uint dwSize;
    public IntPtr pbDevSpecificInfo;
}

[StructLayout(LayoutKind.Sequential, Pack = 4, CharSet = CharSet.Unicode)]
public struct RASDIALEXTENSIONS
{
    public uint dwSize;
    public uint dwfOptions;
    public IntPtr hwndParent;
    public UIntPtr reserved;
    public UIntPtr reserved1;
    public RASEAPINFO RasEapInfo;
    [MarshalAs(UnmanagedType.Bool)] public bool fSkipPppAuth;
    public RASDEVSPECIFICINFO RasDevSpecificInfo;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, Pack:=4, CharSet:=CharSet.Unicode)>
Public Structure RASEAPINFO
    Public dwSizeofEapInfo As UInteger
    Public pbEapInfo As IntPtr
End Structure

<StructLayout(LayoutKind.Sequential, Pack:=4, CharSet:=CharSet.Unicode)>
Public Structure RASDEVSPECIFICINFO
    Public dwSize As UInteger
    Public pbDevSpecificInfo As IntPtr
End Structure

<StructLayout(LayoutKind.Sequential, Pack:=4, CharSet:=CharSet.Unicode)>
Public Structure RASDIALEXTENSIONS
    Public dwSize As UInteger
    Public dwfOptions As UInteger
    Public hwndParent As IntPtr
    Public reserved As UIntPtr
    Public reserved1 As UIntPtr
    Public RasEapInfo As RASEAPINFO
    <MarshalAs(UnmanagedType.Bool)> Public fSkipPppAuth As Boolean
    Public RasDevSpecificInfo As RASDEVSPECIFICINFO
End Structure

import ctypes
from ctypes import wintypes

class RASEAPINFO(ctypes.Structure):
    _pack_ = 4
    _fields_ = [
        ("dwSizeofEapInfo", wintypes.DWORD),
        ("pbEapInfo", ctypes.c_void_p),
    ]

class RASDEVSPECIFICINFO(ctypes.Structure):
    _pack_ = 4
    _fields_ = [
        ("dwSize", wintypes.DWORD),
        ("pbDevSpecificInfo", ctypes.c_void_p),
    ]

class RASDIALEXTENSIONS(ctypes.Structure):
    _pack_ = 4
    _fields_ = [
        ("dwSize", wintypes.DWORD),
        ("dwfOptions", wintypes.DWORD),
        ("hwndParent", ctypes.c_void_p),
        ("reserved", ctypes.c_size_t),
        ("reserved1", ctypes.c_size_t),
        ("RasEapInfo", RASEAPINFO),
        ("fSkipPppAuth", wintypes.BOOL),
        ("RasDevSpecificInfo", RASDEVSPECIFICINFO),
    ]

#[repr(C, packed(4))]
pub struct RASEAPINFO {
    pub dwSizeofEapInfo: u32,
    pub pbEapInfo: *mut core::ffi::c_void,
}

#[repr(C, packed(4))]
pub struct RASDEVSPECIFICINFO {
    pub dwSize: u32,
    pub pbDevSpecificInfo: *mut core::ffi::c_void,
}

#[repr(C, packed(4))]
pub struct RASDIALEXTENSIONS {
    pub dwSize: u32,
    pub dwfOptions: u32,
    pub hwndParent: *mut core::ffi::c_void,
    pub reserved: usize,
    pub reserved1: usize,
    pub RasEapInfo: RASEAPINFO,
    pub fSkipPppAuth: i32,
    pub RasDevSpecificInfo: RASDEVSPECIFICINFO,
}

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

type RASEAPINFO struct {
	dwSizeofEapInfo uint32
	pbEapInfo uintptr
}

type RASDEVSPECIFICINFO struct {
	dwSize uint32
	pbDevSpecificInfo uintptr
}

type RASDIALEXTENSIONS struct {
	dwSize uint32
	dwfOptions uint32
	hwndParent uintptr
	reserved uintptr
	reserved1 uintptr
	RasEapInfo RASEAPINFO
	fSkipPppAuth int32
	RasDevSpecificInfo RASDEVSPECIFICINFO
}

type
  RASEAPINFO = packed record
    dwSizeofEapInfo: DWORD;
    pbEapInfo: Pointer;
  end;

  RASDEVSPECIFICINFO = packed record
    dwSize: DWORD;
    pbDevSpecificInfo: Pointer;
  end;

  RASDIALEXTENSIONS = packed record
    dwSize: DWORD;
    dwfOptions: DWORD;
    hwndParent: Pointer;
    reserved: NativeUInt;
    reserved1: NativeUInt;
    RasEapInfo: RASEAPINFO;
    fSkipPppAuth: BOOL;
    RasDevSpecificInfo: RASDEVSPECIFICINFO;
  end;

const RASEAPINFO = extern struct {
    dwSizeofEapInfo: u32,
    pbEapInfo: ?*anyopaque,
};

const RASDEVSPECIFICINFO = extern struct {
    dwSize: u32,
    pbDevSpecificInfo: ?*anyopaque,
};

const RASDIALEXTENSIONS = extern struct {
    dwSize: u32,
    dwfOptions: u32,
    hwndParent: ?*anyopaque,
    reserved: usize,
    reserved1: usize,
    RasEapInfo: RASEAPINFO,
    fSkipPppAuth: i32,
    RasDevSpecificInfo: RASDEVSPECIFICINFO,
};

type
  RASEAPINFO {.packed.} = object
    dwSizeofEapInfo: uint32
    pbEapInfo: pointer

  RASDEVSPECIFICINFO {.packed.} = object
    dwSize: uint32
    pbDevSpecificInfo: pointer

  RASDIALEXTENSIONS {.packed.} = object
    dwSize: uint32
    dwfOptions: uint32
    hwndParent: pointer
    reserved: uint
    reserved1: uint
    RasEapInfo: RASEAPINFO
    fSkipPppAuth: int32
    RasDevSpecificInfo: RASDEVSPECIFICINFO

align(4)
struct RASEAPINFO
{
    uint dwSizeofEapInfo;
    void* pbEapInfo;
}

align(4)
struct RASDEVSPECIFICINFO
{
    uint dwSize;
    void* pbDevSpecificInfo;
}

align(4)
struct RASDIALEXTENSIONS
{
    uint dwSize;
    uint dwfOptions;
    void* hwndParent;
    size_t reserved;
    size_t reserved1;
    RASEAPINFO RasEapInfo;
    int fSkipPppAuth;
    RASDEVSPECIFICINFO RasDevSpecificInfo;
}