RasEnumConnectionsW

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

DWORD RasEnumConnectionsW(
    RASCONNW* param0,   // optional
    DWORD* param1,
    DWORD* param2
);

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

' param0 : RASCONNW* optional, in/out
' param1 : DWORD* in/out
' param2 : DWORD* out
Declare PtrSafe Function RasEnumConnectionsW 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

RasEnumConnectionsW = ctypes.windll.rasapi32.RasEnumConnectionsW
RasEnumConnectionsW.restype = wintypes.DWORD
RasEnumConnectionsW.argtypes = [
    ctypes.c_void_p,  # param0 : RASCONNW* 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')
RasEnumConnectionsW = Fiddle::Function.new(
  lib['RasEnumConnectionsW'],
  [
    Fiddle::TYPE_VOIDP,  # param0 : RASCONNW* 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 RasEnumConnectionsW(
        param0: *mut RASCONNW,  // RASCONNW* 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 RasEnumConnectionsW(IntPtr param0, ref uint param1, out uint param2);
"@
$api = Add-Type -MemberDefinition $sig -Name 'RASAPI32_RasEnumConnectionsW' -Namespace Win32 -PassThru
# $api::RasEnumConnectionsW(param0, param1, param2)

#uselib "RASAPI32.dll"
#func global RasEnumConnectionsW "RasEnumConnectionsW" wptr, wptr, wptr
; RasEnumConnectionsW varptr(param0), varptr(param1), varptr(param2)   ; 戻り値は stat
; param0 : RASCONNW* 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 RasEnumConnectionsW "RasEnumConnectionsW" var, var, var
; res = RasEnumConnectionsW(param0, param1, param2)
; param0 : RASCONNW* 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 RasEnumConnectionsW(RASCONNW* param0, DWORD* param1, DWORD* param2)
#uselib "RASAPI32.dll"
#cfunc global RasEnumConnectionsW "RasEnumConnectionsW" var, var, var
; res = RasEnumConnectionsW(param0, param1, param2)
; param0 : RASCONNW* 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")
	procRasEnumConnectionsW = rasapi32.NewProc("RasEnumConnectionsW")
)

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

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

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

●RasEnumConnectionsW(param0, param1, param2) = DLL("RASAPI32.dll", "dword RasEnumConnectionsW(void*, void*, void*)")
# 呼び出し: RasEnumConnectionsW(param0, param1, param2)
# param0 : RASCONNW* 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。