RasEnumDevicesW

// RASAPI32.dll  (Unicode / -W)
#include <windows.h>

DWORD RasEnumDevicesW(
    RASDEVINFOW* param0,   // optional
    DWORD* param1,
    DWORD* param2
);

<DllImport("RASAPI32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function RasEnumDevicesW(
    param0 As IntPtr,   ' RASDEVINFOW* optional, in/out
    ByRef param1 As UInteger,   ' DWORD* in/out
    <Out> ByRef param2 As UInteger   ' DWORD* out
) As UInteger
End Function

' param0 : RASDEVINFOW* optional, in/out
' param1 : DWORD* in/out
' param2 : DWORD* out
Declare PtrSafe Function RasEnumDevicesW Lib "rasapi32" ( _
    ByVal param0 As LongPtr, _
    ByRef param1 As Long, _
    ByRef param2 As Long) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

RasEnumDevicesW = ctypes.windll.rasapi32.RasEnumDevicesW
RasEnumDevicesW.restype = wintypes.DWORD
RasEnumDevicesW.argtypes = [
    ctypes.c_void_p,  # param0 : RASDEVINFOW* optional, in/out
    ctypes.POINTER(wintypes.DWORD),  # param1 : DWORD* in/out
    ctypes.POINTER(wintypes.DWORD),  # param2 : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('RASAPI32.dll')
RasEnumDevicesW = Fiddle::Function.new(
  lib['RasEnumDevicesW'],
  [
    Fiddle::TYPE_VOIDP,  # param0 : RASDEVINFOW* optional, in/out
    Fiddle::TYPE_VOIDP,  # param1 : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # param2 : DWORD* out
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "rasapi32")]
extern "system" {
    fn RasEnumDevicesW(
        param0: *mut RASDEVINFOW,  // RASDEVINFOW* optional, in/out
        param1: *mut u32,  // DWORD* in/out
        param2: *mut u32  // DWORD* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("RASAPI32.dll", CharSet = CharSet.Unicode)]
public static extern uint RasEnumDevicesW(IntPtr param0, ref uint param1, out uint param2);
"@
$api = Add-Type -MemberDefinition $sig -Name 'RASAPI32_RasEnumDevicesW' -Namespace Win32 -PassThru
# $api::RasEnumDevicesW(param0, param1, param2)

#uselib "RASAPI32.dll"
#func global RasEnumDevicesW "RasEnumDevicesW" wptr, wptr, wptr
; RasEnumDevicesW varptr(param0), varptr(param1), varptr(param2)   ; 戻り値は stat
; param0 : RASDEVINFOW* optional, in/out -> "wptr"
; param1 : DWORD* in/out -> "wptr"
; param2 : DWORD* out -> "wptr"
; ※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。

#uselib "RASAPI32.dll"
#cfunc global RasEnumDevicesW "RasEnumDevicesW" var, var, var
; res = RasEnumDevicesW(param0, param1, param2)
; param0 : RASDEVINFOW* optional, in/out -> "var"
; param1 : DWORD* in/out -> "var"
; param2 : DWORD* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; DWORD RasEnumDevicesW(RASDEVINFOW* param0, DWORD* param1, DWORD* param2)
#uselib "RASAPI32.dll"
#cfunc global RasEnumDevicesW "RasEnumDevicesW" var, var, var
; res = RasEnumDevicesW(param0, param1, param2)
; param0 : RASDEVINFOW* optional, in/out -> "var"
; param1 : DWORD* in/out -> "var"
; param2 : DWORD* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	rasapi32 = windows.NewLazySystemDLL("RASAPI32.dll")
	procRasEnumDevicesW = rasapi32.NewProc("RasEnumDevicesW")
)

// param0 (RASDEVINFOW* optional, in/out), param1 (DWORD* in/out), param2 (DWORD* out)
r1, _, err := procRasEnumDevicesW.Call(
	uintptr(param0),
	uintptr(param1),
	uintptr(param2),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function RasEnumDevicesW(
  param0: Pointer;   // RASDEVINFOW* optional, in/out
  param1: Pointer;   // DWORD* in/out
  param2: Pointer   // DWORD* out
): DWORD; stdcall;
  external 'RASAPI32.dll' name 'RasEnumDevicesW';

result := DllCall("RASAPI32\RasEnumDevicesW"
    , "Ptr", param0   ; RASDEVINFOW* optional, in/out
    , "Ptr", param1   ; DWORD* in/out
    , "Ptr", param2   ; DWORD* out
    , "UInt")   ; return: DWORD

●RasEnumDevicesW(param0, param1, param2) = DLL("RASAPI32.dll", "dword RasEnumDevicesW(void*, void*, void*)")
# 呼び出し: RasEnumDevicesW(param0, param1, param2)
# param0 : RASDEVINFOW* optional, in/out -> "void*"
# param1 : DWORD* in/out -> "void*"
# param2 : DWORD* 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。