EapHostPeerInvokeIdentityUI

// eappcfg.dll
#include <windows.h>

DWORD EapHostPeerInvokeIdentityUI(
    DWORD dwVersion,
    EAP_METHOD_TYPE eapMethodType,
    DWORD dwFlags,
    HWND hwndParent,
    DWORD dwSizeofConnectionData,
    const BYTE* pConnectionData,
    DWORD dwSizeofUserData,
    const BYTE* pUserData,   // optional
    DWORD* pdwSizeOfUserDataOut,
    BYTE** ppUserDataOut,
    LPWSTR* ppwszIdentity,
    EAP_ERROR** ppEapError,
    void** ppvReserved
);

<DllImport("eappcfg.dll", ExactSpelling:=True)>
Public Shared Function EapHostPeerInvokeIdentityUI(
    dwVersion As UInteger,   ' DWORD
    eapMethodType As EAP_METHOD_TYPE,   ' EAP_METHOD_TYPE
    dwFlags As UInteger,   ' DWORD
    hwndParent As IntPtr,   ' HWND
    dwSizeofConnectionData As UInteger,   ' DWORD
    pConnectionData As IntPtr,   ' BYTE*
    dwSizeofUserData As UInteger,   ' DWORD
    pUserData As IntPtr,   ' BYTE* optional
    <Out> ByRef pdwSizeOfUserDataOut As UInteger,   ' DWORD* out
    ppUserDataOut As IntPtr,   ' BYTE** out
    ppwszIdentity As IntPtr,   ' LPWSTR* out
    ppEapError As IntPtr,   ' EAP_ERROR** out
    ppvReserved As IntPtr   ' void** in/out
) As UInteger
End Function

' dwVersion : DWORD
' eapMethodType : EAP_METHOD_TYPE
' dwFlags : DWORD
' hwndParent : HWND
' dwSizeofConnectionData : DWORD
' pConnectionData : BYTE*
' dwSizeofUserData : DWORD
' pUserData : BYTE* optional
' pdwSizeOfUserDataOut : DWORD* out
' ppUserDataOut : BYTE** out
' ppwszIdentity : LPWSTR* out
' ppEapError : EAP_ERROR** out
' ppvReserved : void** in/out
Declare PtrSafe Function EapHostPeerInvokeIdentityUI Lib "eappcfg" ( _
    ByVal dwVersion As Long, _
    ByVal eapMethodType As LongPtr, _
    ByVal dwFlags As Long, _
    ByVal hwndParent As LongPtr, _
    ByVal dwSizeofConnectionData As Long, _
    ByVal pConnectionData As LongPtr, _
    ByVal dwSizeofUserData As Long, _
    ByVal pUserData As LongPtr, _
    ByRef pdwSizeOfUserDataOut As Long, _
    ByVal ppUserDataOut As LongPtr, _
    ByVal ppwszIdentity As LongPtr, _
    ByVal ppEapError As LongPtr, _
    ByVal ppvReserved As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

EapHostPeerInvokeIdentityUI = ctypes.windll.eappcfg.EapHostPeerInvokeIdentityUI
EapHostPeerInvokeIdentityUI.restype = wintypes.DWORD
EapHostPeerInvokeIdentityUI.argtypes = [
    wintypes.DWORD,  # dwVersion : DWORD
    EAP_METHOD_TYPE,  # eapMethodType : EAP_METHOD_TYPE
    wintypes.DWORD,  # dwFlags : DWORD
    wintypes.HANDLE,  # hwndParent : HWND
    wintypes.DWORD,  # dwSizeofConnectionData : DWORD
    ctypes.POINTER(ctypes.c_ubyte),  # pConnectionData : BYTE*
    wintypes.DWORD,  # dwSizeofUserData : DWORD
    ctypes.POINTER(ctypes.c_ubyte),  # pUserData : BYTE* optional
    ctypes.POINTER(wintypes.DWORD),  # pdwSizeOfUserDataOut : DWORD* out
    ctypes.c_void_p,  # ppUserDataOut : BYTE** out
    ctypes.c_void_p,  # ppwszIdentity : LPWSTR* out
    ctypes.c_void_p,  # ppEapError : EAP_ERROR** out
    ctypes.c_void_p,  # ppvReserved : void** in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('eappcfg.dll')
EapHostPeerInvokeIdentityUI = Fiddle::Function.new(
  lib['EapHostPeerInvokeIdentityUI'],
  [
    -Fiddle::TYPE_INT,  # dwVersion : DWORD
    Fiddle::TYPE_VOIDP,  # eapMethodType : EAP_METHOD_TYPE
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    Fiddle::TYPE_VOIDP,  # hwndParent : HWND
    -Fiddle::TYPE_INT,  # dwSizeofConnectionData : DWORD
    Fiddle::TYPE_VOIDP,  # pConnectionData : BYTE*
    -Fiddle::TYPE_INT,  # dwSizeofUserData : DWORD
    Fiddle::TYPE_VOIDP,  # pUserData : BYTE* optional
    Fiddle::TYPE_VOIDP,  # pdwSizeOfUserDataOut : DWORD* out
    Fiddle::TYPE_VOIDP,  # ppUserDataOut : BYTE** out
    Fiddle::TYPE_VOIDP,  # ppwszIdentity : LPWSTR* out
    Fiddle::TYPE_VOIDP,  # ppEapError : EAP_ERROR** out
    Fiddle::TYPE_VOIDP,  # ppvReserved : void** in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "eappcfg")]
extern "system" {
    fn EapHostPeerInvokeIdentityUI(
        dwVersion: u32,  // DWORD
        eapMethodType: EAP_METHOD_TYPE,  // EAP_METHOD_TYPE
        dwFlags: u32,  // DWORD
        hwndParent: *mut core::ffi::c_void,  // HWND
        dwSizeofConnectionData: u32,  // DWORD
        pConnectionData: *const u8,  // BYTE*
        dwSizeofUserData: u32,  // DWORD
        pUserData: *const u8,  // BYTE* optional
        pdwSizeOfUserDataOut: *mut u32,  // DWORD* out
        ppUserDataOut: *mut *mut u8,  // BYTE** out
        ppwszIdentity: *mut *mut u16,  // LPWSTR* out
        ppEapError: *mut *mut EAP_ERROR,  // EAP_ERROR** out
        ppvReserved: *mut *mut ()  // void** in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("eappcfg.dll")]
public static extern uint EapHostPeerInvokeIdentityUI(uint dwVersion, EAP_METHOD_TYPE eapMethodType, uint dwFlags, IntPtr hwndParent, uint dwSizeofConnectionData, IntPtr pConnectionData, uint dwSizeofUserData, IntPtr pUserData, out uint pdwSizeOfUserDataOut, IntPtr ppUserDataOut, IntPtr ppwszIdentity, IntPtr ppEapError, IntPtr ppvReserved);
"@
$api = Add-Type -MemberDefinition $sig -Name 'eappcfg_EapHostPeerInvokeIdentityUI' -Namespace Win32 -PassThru
# $api::EapHostPeerInvokeIdentityUI(dwVersion, eapMethodType, dwFlags, hwndParent, dwSizeofConnectionData, pConnectionData, dwSizeofUserData, pUserData, pdwSizeOfUserDataOut, ppUserDataOut, ppwszIdentity, ppEapError, ppvReserved)

#uselib "eappcfg.dll"
#func global EapHostPeerInvokeIdentityUI "EapHostPeerInvokeIdentityUI" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; EapHostPeerInvokeIdentityUI dwVersion, eapMethodType, dwFlags, hwndParent, dwSizeofConnectionData, varptr(pConnectionData), dwSizeofUserData, varptr(pUserData), varptr(pdwSizeOfUserDataOut), varptr(ppUserDataOut), varptr(ppwszIdentity), varptr(ppEapError), ppvReserved   ; 戻り値は stat
; dwVersion : DWORD -> "sptr"
; eapMethodType : EAP_METHOD_TYPE -> "sptr"
; dwFlags : DWORD -> "sptr"
; hwndParent : HWND -> "sptr"
; dwSizeofConnectionData : DWORD -> "sptr"
; pConnectionData : BYTE* -> "sptr"
; dwSizeofUserData : DWORD -> "sptr"
; pUserData : BYTE* optional -> "sptr"
; pdwSizeOfUserDataOut : DWORD* out -> "sptr"
; ppUserDataOut : BYTE** out -> "sptr"
; ppwszIdentity : LPWSTR* out -> "sptr"
; ppEapError : EAP_ERROR** out -> "sptr"
; ppvReserved : void** in/out -> "sptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	eappcfg = windows.NewLazySystemDLL("eappcfg.dll")
	procEapHostPeerInvokeIdentityUI = eappcfg.NewProc("EapHostPeerInvokeIdentityUI")
)

// dwVersion (DWORD), eapMethodType (EAP_METHOD_TYPE), dwFlags (DWORD), hwndParent (HWND), dwSizeofConnectionData (DWORD), pConnectionData (BYTE*), dwSizeofUserData (DWORD), pUserData (BYTE* optional), pdwSizeOfUserDataOut (DWORD* out), ppUserDataOut (BYTE** out), ppwszIdentity (LPWSTR* out), ppEapError (EAP_ERROR** out), ppvReserved (void** in/out)
r1, _, err := procEapHostPeerInvokeIdentityUI.Call(
	uintptr(dwVersion),
	uintptr(eapMethodType),
	uintptr(dwFlags),
	uintptr(hwndParent),
	uintptr(dwSizeofConnectionData),
	uintptr(pConnectionData),
	uintptr(dwSizeofUserData),
	uintptr(pUserData),
	uintptr(pdwSizeOfUserDataOut),
	uintptr(ppUserDataOut),
	uintptr(ppwszIdentity),
	uintptr(ppEapError),
	uintptr(ppvReserved),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function EapHostPeerInvokeIdentityUI(
  dwVersion: DWORD;   // DWORD
  eapMethodType: EAP_METHOD_TYPE;   // EAP_METHOD_TYPE
  dwFlags: DWORD;   // DWORD
  hwndParent: THandle;   // HWND
  dwSizeofConnectionData: DWORD;   // DWORD
  pConnectionData: Pointer;   // BYTE*
  dwSizeofUserData: DWORD;   // DWORD
  pUserData: Pointer;   // BYTE* optional
  pdwSizeOfUserDataOut: Pointer;   // DWORD* out
  ppUserDataOut: Pointer;   // BYTE** out
  ppwszIdentity: PPWideChar;   // LPWSTR* out
  ppEapError: Pointer;   // EAP_ERROR** out
  ppvReserved: Pointer   // void** in/out
): DWORD; stdcall;
  external 'eappcfg.dll' name 'EapHostPeerInvokeIdentityUI';

result := DllCall("eappcfg\EapHostPeerInvokeIdentityUI"
    , "UInt", dwVersion   ; DWORD
    , "Ptr", eapMethodType   ; EAP_METHOD_TYPE
    , "UInt", dwFlags   ; DWORD
    , "Ptr", hwndParent   ; HWND
    , "UInt", dwSizeofConnectionData   ; DWORD
    , "Ptr", pConnectionData   ; BYTE*
    , "UInt", dwSizeofUserData   ; DWORD
    , "Ptr", pUserData   ; BYTE* optional
    , "Ptr", pdwSizeOfUserDataOut   ; DWORD* out
    , "Ptr", ppUserDataOut   ; BYTE** out
    , "Ptr", ppwszIdentity   ; LPWSTR* out
    , "Ptr", ppEapError   ; EAP_ERROR** out
    , "Ptr", ppvReserved   ; void** in/out
    , "UInt")   ; return: DWORD

●EapHostPeerInvokeIdentityUI(dwVersion, eapMethodType, dwFlags, hwndParent, dwSizeofConnectionData, pConnectionData, dwSizeofUserData, pUserData, pdwSizeOfUserDataOut, ppUserDataOut, ppwszIdentity, ppEapError, ppvReserved) = DLL("eappcfg.dll", "dword EapHostPeerInvokeIdentityUI(dword, void*, dword, void*, dword, void*, dword, void*, void*, void*, void*, void*, void*)")
# 呼び出し: EapHostPeerInvokeIdentityUI(dwVersion, eapMethodType, dwFlags, hwndParent, dwSizeofConnectionData, pConnectionData, dwSizeofUserData, pUserData, pdwSizeOfUserDataOut, ppUserDataOut, ppwszIdentity, ppEapError, ppvReserved)
# dwVersion : DWORD -> "dword"
# eapMethodType : EAP_METHOD_TYPE -> "void*"
# dwFlags : DWORD -> "dword"
# hwndParent : HWND -> "void*"
# dwSizeofConnectionData : DWORD -> "dword"
# pConnectionData : BYTE* -> "void*"
# dwSizeofUserData : DWORD -> "dword"
# pUserData : BYTE* optional -> "void*"
# pdwSizeOfUserDataOut : DWORD* out -> "void*"
# ppUserDataOut : BYTE** out -> "void*"
# ppwszIdentity : LPWSTR* out -> "void*"
# ppEapError : EAP_ERROR** out -> "void*"
# ppvReserved : void** in/out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。

const std = @import("std");

extern "eappcfg" fn EapHostPeerInvokeIdentityUI(
    dwVersion: u32, // DWORD
    eapMethodType: EAP_METHOD_TYPE, // EAP_METHOD_TYPE
    dwFlags: u32, // DWORD
    hwndParent: ?*anyopaque, // HWND
    dwSizeofConnectionData: u32, // DWORD
    pConnectionData: [*c]u8, // BYTE*
    dwSizeofUserData: u32, // DWORD
    pUserData: [*c]u8, // BYTE* optional
    pdwSizeOfUserDataOut: [*c]u32, // DWORD* out
    ppUserDataOut: [*c][*c]u8, // BYTE** out
    ppwszIdentity: [*c][*c]u16, // LPWSTR* out
    ppEapError: [*c][*c]EAP_ERROR, // EAP_ERROR** out
    ppvReserved: ?*anyopaque // void** in/out
) callconv(std.os.windows.WINAPI) u32;

proc EapHostPeerInvokeIdentityUI(
    dwVersion: uint32,  # DWORD
    eapMethodType: EAP_METHOD_TYPE,  # EAP_METHOD_TYPE
    dwFlags: uint32,  # DWORD
    hwndParent: pointer,  # HWND
    dwSizeofConnectionData: uint32,  # DWORD
    pConnectionData: ptr uint8,  # BYTE*
    dwSizeofUserData: uint32,  # DWORD
    pUserData: ptr uint8,  # BYTE* optional
    pdwSizeOfUserDataOut: ptr uint32,  # DWORD* out
    ppUserDataOut: ptr uint8,  # BYTE** out
    ppwszIdentity: ptr WideCString,  # LPWSTR* out
    ppEapError: ptr EAP_ERROR,  # EAP_ERROR** out
    ppvReserved: pointer  # void** in/out
): uint32 {.importc: "EapHostPeerInvokeIdentityUI", stdcall, dynlib: "eappcfg.dll".}

pragma(lib, "eappcfg");
extern(Windows)
uint EapHostPeerInvokeIdentityUI(
    uint dwVersion,   // DWORD
    EAP_METHOD_TYPE eapMethodType,   // EAP_METHOD_TYPE
    uint dwFlags,   // DWORD
    void* hwndParent,   // HWND
    uint dwSizeofConnectionData,   // DWORD
    ubyte* pConnectionData,   // BYTE*
    uint dwSizeofUserData,   // DWORD
    ubyte* pUserData,   // BYTE* optional
    uint* pdwSizeOfUserDataOut,   // DWORD* out
    ubyte** ppUserDataOut,   // BYTE** out
    wchar** ppwszIdentity,   // LPWSTR* out
    EAP_ERROR** ppEapError,   // EAP_ERROR** out
    void** ppvReserved   // void** in/out
);

ccall((:EapHostPeerInvokeIdentityUI, "eappcfg.dll"), stdcall, UInt32,
      (UInt32, EAP_METHOD_TYPE, UInt32, Ptr{Cvoid}, UInt32, Ptr{UInt8}, UInt32, Ptr{UInt8}, Ptr{UInt32}, Ptr{UInt8}, Ptr{Ptr{UInt16}}, Ptr{EAP_ERROR}, Ptr{Cvoid}),
      dwVersion, eapMethodType, dwFlags, hwndParent, dwSizeofConnectionData, pConnectionData, dwSizeofUserData, pUserData, pdwSizeOfUserDataOut, ppUserDataOut, ppwszIdentity, ppEapError, ppvReserved)
# dwVersion : DWORD -> UInt32
# eapMethodType : EAP_METHOD_TYPE -> EAP_METHOD_TYPE
# dwFlags : DWORD -> UInt32
# hwndParent : HWND -> Ptr{Cvoid}
# dwSizeofConnectionData : DWORD -> UInt32
# pConnectionData : BYTE* -> Ptr{UInt8}
# dwSizeofUserData : DWORD -> UInt32
# pUserData : BYTE* optional -> Ptr{UInt8}
# pdwSizeOfUserDataOut : DWORD* out -> Ptr{UInt32}
# ppUserDataOut : BYTE** out -> Ptr{UInt8}
# ppwszIdentity : LPWSTR* out -> Ptr{Ptr{UInt16}}
# ppEapError : EAP_ERROR** out -> Ptr{EAP_ERROR}
# ppvReserved : void** in/out -> Ptr{Cvoid}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t EapHostPeerInvokeIdentityUI(
    uint32_t dwVersion,
    EAP_METHOD_TYPE eapMethodType,
    uint32_t dwFlags,
    void* hwndParent,
    uint32_t dwSizeofConnectionData,
    uint8_t* pConnectionData,
    uint32_t dwSizeofUserData,
    uint8_t* pUserData,
    uint32_t* pdwSizeOfUserDataOut,
    uint8_t** ppUserDataOut,
    uint16_t** ppwszIdentity,
    void* ppEapError,
    void** ppvReserved);
]]
local eappcfg = ffi.load("eappcfg")
-- eappcfg.EapHostPeerInvokeIdentityUI(dwVersion, eapMethodType, dwFlags, hwndParent, dwSizeofConnectionData, pConnectionData, dwSizeofUserData, pUserData, pdwSizeOfUserDataOut, ppUserDataOut, ppwszIdentity, ppEapError, ppvReserved)
-- dwVersion : DWORD
-- eapMethodType : EAP_METHOD_TYPE
-- dwFlags : DWORD
-- hwndParent : HWND
-- dwSizeofConnectionData : DWORD
-- pConnectionData : BYTE*
-- dwSizeofUserData : DWORD
-- pUserData : BYTE* optional
-- pdwSizeOfUserDataOut : DWORD* out
-- ppUserDataOut : BYTE** out
-- ppwszIdentity : LPWSTR* out
-- ppEapError : EAP_ERROR** out
-- ppvReserved : void** in/out
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('eappcfg.dll');
const EapHostPeerInvokeIdentityUI = lib.func('__stdcall', 'EapHostPeerInvokeIdentityUI', 'uint32_t', ['uint32_t', 'EAP_METHOD_TYPE', 'uint32_t', 'void *', 'uint32_t', 'uint8_t *', 'uint32_t', 'uint8_t *', 'uint32_t *', 'uint8_t *', 'void *', 'void *', 'void *']);
// EapHostPeerInvokeIdentityUI(dwVersion, eapMethodType, dwFlags, hwndParent, dwSizeofConnectionData, pConnectionData, dwSizeofUserData, pUserData, pdwSizeOfUserDataOut, ppUserDataOut, ppwszIdentity, ppEapError, ppvReserved)
// dwVersion : DWORD -> 'uint32_t'
// eapMethodType : EAP_METHOD_TYPE -> 'EAP_METHOD_TYPE'
// dwFlags : DWORD -> 'uint32_t'
// hwndParent : HWND -> 'void *'
// dwSizeofConnectionData : DWORD -> 'uint32_t'
// pConnectionData : BYTE* -> 'uint8_t *'
// dwSizeofUserData : DWORD -> 'uint32_t'
// pUserData : BYTE* optional -> 'uint8_t *'
// pdwSizeOfUserDataOut : DWORD* out -> 'uint32_t *'
// ppUserDataOut : BYTE** out -> 'uint8_t *'
// ppwszIdentity : LPWSTR* out -> 'void *'
// ppEapError : EAP_ERROR** out -> 'void *'
// ppvReserved : void** in/out -> 'void *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("eappcfg.dll", {
  EapHostPeerInvokeIdentityUI: { parameters: ["u32", "buffer", "u32", "pointer", "u32", "pointer", "u32", "pointer", "pointer", "pointer", "pointer", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.EapHostPeerInvokeIdentityUI(dwVersion, eapMethodType, dwFlags, hwndParent, dwSizeofConnectionData, pConnectionData, dwSizeofUserData, pUserData, pdwSizeOfUserDataOut, ppUserDataOut, ppwszIdentity, ppEapError, ppvReserved)
// dwVersion : DWORD -> "u32"
// eapMethodType : EAP_METHOD_TYPE -> "buffer"
// dwFlags : DWORD -> "u32"
// hwndParent : HWND -> "pointer"
// dwSizeofConnectionData : DWORD -> "u32"
// pConnectionData : BYTE* -> "pointer"
// dwSizeofUserData : DWORD -> "u32"
// pUserData : BYTE* optional -> "pointer"
// pdwSizeOfUserDataOut : DWORD* out -> "pointer"
// ppUserDataOut : BYTE** out -> "pointer"
// ppwszIdentity : LPWSTR* out -> "pointer"
// ppEapError : EAP_ERROR** out -> "pointer"
// ppvReserved : void** in/out -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
uint32_t EapHostPeerInvokeIdentityUI(
    uint32_t dwVersion,
    EAP_METHOD_TYPE eapMethodType,
    uint32_t dwFlags,
    void* hwndParent,
    uint32_t dwSizeofConnectionData,
    uint8_t* pConnectionData,
    uint32_t dwSizeofUserData,
    uint8_t* pUserData,
    uint32_t* pdwSizeOfUserDataOut,
    uint8_t** ppUserDataOut,
    uint16_t** ppwszIdentity,
    void* ppEapError,
    void** ppvReserved);
C, "eappcfg.dll");
// $ffi->EapHostPeerInvokeIdentityUI(dwVersion, eapMethodType, dwFlags, hwndParent, dwSizeofConnectionData, pConnectionData, dwSizeofUserData, pUserData, pdwSizeOfUserDataOut, ppUserDataOut, ppwszIdentity, ppEapError, ppvReserved);
// dwVersion : DWORD
// eapMethodType : EAP_METHOD_TYPE
// dwFlags : DWORD
// hwndParent : HWND
// dwSizeofConnectionData : DWORD
// pConnectionData : BYTE*
// dwSizeofUserData : DWORD
// pUserData : BYTE* optional
// pdwSizeOfUserDataOut : DWORD* out
// ppUserDataOut : BYTE** out
// ppwszIdentity : LPWSTR* out
// ppEapError : EAP_ERROR** out
// ppvReserved : void** in/out
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Eappcfg extends StdCallLibrary {
    Eappcfg INSTANCE = Native.load("eappcfg", Eappcfg.class);
    int EapHostPeerInvokeIdentityUI(
        int dwVersion,   // DWORD
        EAP_METHOD_TYPE /* extends Structure (by value) */ eapMethodType,   // EAP_METHOD_TYPE
        int dwFlags,   // DWORD
        Pointer hwndParent,   // HWND
        int dwSizeofConnectionData,   // DWORD
        byte[] pConnectionData,   // BYTE*
        int dwSizeofUserData,   // DWORD
        byte[] pUserData,   // BYTE* optional
        IntByReference pdwSizeOfUserDataOut,   // DWORD* out
        Pointer ppUserDataOut,   // BYTE** out
        PointerByReference ppwszIdentity,   // LPWSTR* out
        Pointer ppEapError,   // EAP_ERROR** out
        Pointer ppvReserved   // void** in/out
    );
}

@[Link("eappcfg")]
lib Libeappcfg
  fun EapHostPeerInvokeIdentityUI = EapHostPeerInvokeIdentityUI(
    dwVersion : UInt32,   # DWORD
    eapMethodType : EAP_METHOD_TYPE,   # EAP_METHOD_TYPE
    dwFlags : UInt32,   # DWORD
    hwndParent : Void*,   # HWND
    dwSizeofConnectionData : UInt32,   # DWORD
    pConnectionData : UInt8*,   # BYTE*
    dwSizeofUserData : UInt32,   # DWORD
    pUserData : UInt8*,   # BYTE* optional
    pdwSizeOfUserDataOut : UInt32*,   # DWORD* out
    ppUserDataOut : UInt8**,   # BYTE** out
    ppwszIdentity : UInt16**,   # LPWSTR* out
    ppEapError : EAP_ERROR**,   # EAP_ERROR** out
    ppvReserved : Void**   # void** in/out
  ) : UInt32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef EapHostPeerInvokeIdentityUINative = Uint32 Function(Uint32, EAP_METHOD_TYPE, Uint32, Pointer<Void>, Uint32, Pointer<Uint8>, Uint32, Pointer<Uint8>, Pointer<Uint32>, Pointer<Uint8>, Pointer<Pointer<Utf16>>, Pointer<Void>, Pointer<Void>);
typedef EapHostPeerInvokeIdentityUIDart = int Function(int, int, int, Pointer<Void>, int, Pointer<Uint8>, int, Pointer<Uint8>, Pointer<Uint32>, Pointer<Uint8>, Pointer<Pointer<Utf16>>, Pointer<Void>, Pointer<Void>);
final EapHostPeerInvokeIdentityUI = DynamicLibrary.open('eappcfg.dll')
    .lookupFunction<EapHostPeerInvokeIdentityUINative, EapHostPeerInvokeIdentityUIDart>('EapHostPeerInvokeIdentityUI');
// dwVersion : DWORD -> Uint32
// eapMethodType : EAP_METHOD_TYPE -> EAP_METHOD_TYPE
// dwFlags : DWORD -> Uint32
// hwndParent : HWND -> Pointer<Void>
// dwSizeofConnectionData : DWORD -> Uint32
// pConnectionData : BYTE* -> Pointer<Uint8>
// dwSizeofUserData : DWORD -> Uint32
// pUserData : BYTE* optional -> Pointer<Uint8>
// pdwSizeOfUserDataOut : DWORD* out -> Pointer<Uint32>
// ppUserDataOut : BYTE** out -> Pointer<Uint8>
// ppwszIdentity : LPWSTR* out -> Pointer<Pointer<Utf16>>
// ppEapError : EAP_ERROR** out -> Pointer<Void>
// ppvReserved : void** in/out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function EapHostPeerInvokeIdentityUI(
  dwVersion: DWORD;   // DWORD
  eapMethodType: EAP_METHOD_TYPE;   // EAP_METHOD_TYPE
  dwFlags: DWORD;   // DWORD
  hwndParent: THandle;   // HWND
  dwSizeofConnectionData: DWORD;   // DWORD
  pConnectionData: Pointer;   // BYTE*
  dwSizeofUserData: DWORD;   // DWORD
  pUserData: Pointer;   // BYTE* optional
  pdwSizeOfUserDataOut: Pointer;   // DWORD* out
  ppUserDataOut: Pointer;   // BYTE** out
  ppwszIdentity: PPWideChar;   // LPWSTR* out
  ppEapError: Pointer;   // EAP_ERROR** out
  ppvReserved: Pointer   // void** in/out
): DWORD; stdcall;
  external 'eappcfg.dll' name 'EapHostPeerInvokeIdentityUI';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "EapHostPeerInvokeIdentityUI"
  c_EapHostPeerInvokeIdentityUI :: Word32 -> EAP_METHOD_TYPE -> Word32 -> Ptr () -> Word32 -> Ptr Word8 -> Word32 -> Ptr Word8 -> Ptr Word32 -> Ptr Word8 -> Ptr CWString -> Ptr () -> Ptr () -> IO Word32
-- dwVersion : DWORD -> Word32
-- eapMethodType : EAP_METHOD_TYPE -> EAP_METHOD_TYPE
-- dwFlags : DWORD -> Word32
-- hwndParent : HWND -> Ptr ()
-- dwSizeofConnectionData : DWORD -> Word32
-- pConnectionData : BYTE* -> Ptr Word8
-- dwSizeofUserData : DWORD -> Word32
-- pUserData : BYTE* optional -> Ptr Word8
-- pdwSizeOfUserDataOut : DWORD* out -> Ptr Word32
-- ppUserDataOut : BYTE** out -> Ptr Word8
-- ppwszIdentity : LPWSTR* out -> Ptr CWString
-- ppEapError : EAP_ERROR** out -> Ptr ()
-- ppvReserved : void** in/out -> Ptr ()
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。
-- ※値渡し構造体は GHC FFI で直接渡せません。Ptr で渡すラッパ(C側)経由にしてください。

open Ctypes
open Foreign

let eaphostpeerinvokeidentityui =
  foreign "EapHostPeerInvokeIdentityUI"
    (uint32_t @-> EAP_METHOD_TYPE @-> uint32_t @-> (ptr void) @-> uint32_t @-> (ptr uint8_t) @-> uint32_t @-> (ptr uint8_t) @-> (ptr uint32_t) @-> (ptr uint8_t) @-> (ptr (ptr uint16_t)) @-> (ptr void) @-> (ptr void) @-> returning uint32_t)
(* dwVersion : DWORD -> uint32_t *)
(* eapMethodType : EAP_METHOD_TYPE -> EAP_METHOD_TYPE *)
(* dwFlags : DWORD -> uint32_t *)
(* hwndParent : HWND -> (ptr void) *)
(* dwSizeofConnectionData : DWORD -> uint32_t *)
(* pConnectionData : BYTE* -> (ptr uint8_t) *)
(* dwSizeofUserData : DWORD -> uint32_t *)
(* pUserData : BYTE* optional -> (ptr uint8_t) *)
(* pdwSizeOfUserDataOut : DWORD* out -> (ptr uint32_t) *)
(* ppUserDataOut : BYTE** out -> (ptr uint8_t) *)
(* ppwszIdentity : LPWSTR* out -> (ptr (ptr uint16_t)) *)
(* ppEapError : EAP_ERROR** out -> (ptr void) *)
(* ppvReserved : void** in/out -> (ptr void) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library eappcfg (t "eappcfg.dll"))
(cffi:use-foreign-library eappcfg)

(cffi:defcfun ("EapHostPeerInvokeIdentityUI" eap-host-peer-invoke-identity-ui :convention :stdcall) :uint32
  (dw-version :uint32)   ; DWORD
  (eap-method-type (:struct eap-method-type))   ; EAP_METHOD_TYPE
  (dw-flags :uint32)   ; DWORD
  (hwnd-parent :pointer)   ; HWND
  (dw-sizeof-connection-data :uint32)   ; DWORD
  (p-connection-data :pointer)   ; BYTE*
  (dw-sizeof-user-data :uint32)   ; DWORD
  (p-user-data :pointer)   ; BYTE* optional
  (pdw-size-of-user-data-out :pointer)   ; DWORD* out
  (pp-user-data-out :pointer)   ; BYTE** out
  (ppwsz-identity :pointer)   ; LPWSTR* out
  (pp-eap-error :pointer)   ; EAP_ERROR** out
  (ppv-reserved :pointer))   ; void** in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $EapHostPeerInvokeIdentityUI = Win32::API::More->new('eappcfg',
    'DWORD EapHostPeerInvokeIdentityUI(DWORD dwVersion, LPVOID eapMethodType, DWORD dwFlags, HANDLE hwndParent, DWORD dwSizeofConnectionData, LPVOID pConnectionData, DWORD dwSizeofUserData, LPVOID pUserData, LPVOID pdwSizeOfUserDataOut, LPVOID ppUserDataOut, LPVOID ppwszIdentity, LPVOID ppEapError, LPVOID ppvReserved)');
# my $ret = $EapHostPeerInvokeIdentityUI->Call($dwVersion, $eapMethodType, $dwFlags, $hwndParent, $dwSizeofConnectionData, $pConnectionData, $dwSizeofUserData, $pUserData, $pdwSizeOfUserDataOut, $ppUserDataOut, $ppwszIdentity, $ppEapError, $ppvReserved);
# dwVersion : DWORD -> DWORD
# eapMethodType : EAP_METHOD_TYPE -> LPVOID
# dwFlags : DWORD -> DWORD
# hwndParent : HWND -> HANDLE
# dwSizeofConnectionData : DWORD -> DWORD
# pConnectionData : BYTE* -> LPVOID
# dwSizeofUserData : DWORD -> DWORD
# pUserData : BYTE* optional -> LPVOID
# pdwSizeOfUserDataOut : DWORD* out -> LPVOID
# ppUserDataOut : BYTE** out -> LPVOID
# ppwszIdentity : LPWSTR* out -> LPVOID
# ppEapError : EAP_ERROR** out -> LPVOID
# ppvReserved : void** in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。