RasEnumEntriesA

// RASAPI32.dll  (ANSI / -A)
#include <windows.h>

DWORD RasEnumEntriesA(
    LPCSTR param0,   // optional
    LPCSTR param1,   // optional
    RASENTRYNAMEA* param2,   // optional
    DWORD* param3,
    DWORD* param4
);

<DllImport("RASAPI32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function RasEnumEntriesA(
    <MarshalAs(UnmanagedType.LPStr)> param0 As String,   ' LPCSTR optional
    <MarshalAs(UnmanagedType.LPStr)> param1 As String,   ' LPCSTR optional
    param2 As IntPtr,   ' RASENTRYNAMEA* optional, in/out
    ByRef param3 As UInteger,   ' DWORD* in/out
    <Out> ByRef param4 As UInteger   ' DWORD* out
) As UInteger
End Function

' param0 : LPCSTR optional
' param1 : LPCSTR optional
' param2 : RASENTRYNAMEA* optional, in/out
' param3 : DWORD* in/out
' param4 : DWORD* out
Declare PtrSafe Function RasEnumEntriesA Lib "rasapi32" ( _
    ByVal param0 As String, _
    ByVal param1 As String, _
    ByVal param2 As LongPtr, _
    ByRef param3 As Long, _
    ByRef param4 As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

RasEnumEntriesA = ctypes.windll.rasapi32.RasEnumEntriesA
RasEnumEntriesA.restype = wintypes.DWORD
RasEnumEntriesA.argtypes = [
    wintypes.LPCSTR,  # param0 : LPCSTR optional
    wintypes.LPCSTR,  # param1 : LPCSTR optional
    ctypes.c_void_p,  # param2 : RASENTRYNAMEA* optional, in/out
    ctypes.POINTER(wintypes.DWORD),  # param3 : DWORD* in/out
    ctypes.POINTER(wintypes.DWORD),  # param4 : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('RASAPI32.dll')
RasEnumEntriesA = Fiddle::Function.new(
  lib['RasEnumEntriesA'],
  [
    Fiddle::TYPE_VOIDP,  # param0 : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # param1 : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # param2 : RASENTRYNAMEA* optional, in/out
    Fiddle::TYPE_VOIDP,  # param3 : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # param4 : DWORD* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "rasapi32")]
extern "system" {
    fn RasEnumEntriesA(
        param0: *const u8,  // LPCSTR optional
        param1: *const u8,  // LPCSTR optional
        param2: *mut RASENTRYNAMEA,  // RASENTRYNAMEA* optional, in/out
        param3: *mut u32,  // DWORD* in/out
        param4: *mut u32  // DWORD* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("RASAPI32.dll", CharSet = CharSet.Ansi)]
public static extern uint RasEnumEntriesA([MarshalAs(UnmanagedType.LPStr)] string param0, [MarshalAs(UnmanagedType.LPStr)] string param1, IntPtr param2, ref uint param3, out uint param4);
"@
$api = Add-Type -MemberDefinition $sig -Name 'RASAPI32_RasEnumEntriesA' -Namespace Win32 -PassThru
# $api::RasEnumEntriesA(param0, param1, param2, param3, param4)

#uselib "RASAPI32.dll"
#func global RasEnumEntriesA "RasEnumEntriesA" sptr, sptr, sptr, sptr, sptr
; RasEnumEntriesA param0, param1, varptr(param2), varptr(param3), varptr(param4)   ; 戻り値は stat
; param0 : LPCSTR optional -> "sptr"
; param1 : LPCSTR optional -> "sptr"
; param2 : RASENTRYNAMEA* optional, in/out -> "sptr"
; param3 : DWORD* in/out -> "sptr"
; param4 : DWORD* out -> "sptr"
; ※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 RasEnumEntriesA "RasEnumEntriesA" str, str, var, var, var
; res = RasEnumEntriesA(param0, param1, param2, param3, param4)
; param0 : LPCSTR optional -> "str"
; param1 : LPCSTR optional -> "str"
; param2 : RASENTRYNAMEA* optional, in/out -> "var"
; param3 : DWORD* in/out -> "var"
; param4 : 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 RasEnumEntriesA(LPCSTR param0, LPCSTR param1, RASENTRYNAMEA* param2, DWORD* param3, DWORD* param4)
#uselib "RASAPI32.dll"
#cfunc global RasEnumEntriesA "RasEnumEntriesA" str, str, var, var, var
; res = RasEnumEntriesA(param0, param1, param2, param3, param4)
; param0 : LPCSTR optional -> "str"
; param1 : LPCSTR optional -> "str"
; param2 : RASENTRYNAMEA* optional, in/out -> "var"
; param3 : DWORD* in/out -> "var"
; param4 : 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")
	procRasEnumEntriesA = rasapi32.NewProc("RasEnumEntriesA")
)

// param0 (LPCSTR optional), param1 (LPCSTR optional), param2 (RASENTRYNAMEA* optional, in/out), param3 (DWORD* in/out), param4 (DWORD* out)
r1, _, err := procRasEnumEntriesA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(param0))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(param1))),
	uintptr(param2),
	uintptr(param3),
	uintptr(param4),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function RasEnumEntriesA(
  param0: PAnsiChar;   // LPCSTR optional
  param1: PAnsiChar;   // LPCSTR optional
  param2: Pointer;   // RASENTRYNAMEA* optional, in/out
  param3: Pointer;   // DWORD* in/out
  param4: Pointer   // DWORD* out
): DWORD; stdcall;
  external 'RASAPI32.dll' name 'RasEnumEntriesA';

result := DllCall("RASAPI32\RasEnumEntriesA"
    , "AStr", param0   ; LPCSTR optional
    , "AStr", param1   ; LPCSTR optional
    , "Ptr", param2   ; RASENTRYNAMEA* optional, in/out
    , "Ptr", param3   ; DWORD* in/out
    , "Ptr", param4   ; DWORD* out
    , "UInt")   ; return: DWORD

●RasEnumEntriesA(param0, param1, param2, param3, param4) = DLL("RASAPI32.dll", "dword RasEnumEntriesA(char*, char*, void*, void*, void*)")
# 呼び出し: RasEnumEntriesA(param0, param1, param2, param3, param4)
# param0 : LPCSTR optional -> "char*"
# param1 : LPCSTR optional -> "char*"
# param2 : RASENTRYNAMEA* optional, in/out -> "void*"
# param3 : DWORD* in/out -> "void*"
# param4 : 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)。