RtmGetEnumNextHops

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

DWORD RtmGetEnumNextHops(
    INT_PTR RtmRegHandle,
    INT_PTR EnumHandle,
    DWORD* NumNextHops,
    INT_PTR* NextHopHandles
);

<DllImport("rtm.dll", ExactSpelling:=True)>
Public Shared Function RtmGetEnumNextHops(
    RtmRegHandle As IntPtr,   ' INT_PTR
    EnumHandle As IntPtr,   ' INT_PTR
    ByRef NumNextHops As UInteger,   ' DWORD* in/out
    ByRef NextHopHandles As IntPtr   ' INT_PTR* in/out
) As UInteger
End Function

' RtmRegHandle : INT_PTR
' EnumHandle : INT_PTR
' NumNextHops : DWORD* in/out
' NextHopHandles : INT_PTR* in/out
Declare PtrSafe Function RtmGetEnumNextHops Lib "rtm" ( _
    ByVal RtmRegHandle As LongPtr, _
    ByVal EnumHandle As LongPtr, _
    ByRef NumNextHops As Long, _
    ByRef NextHopHandles 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

RtmGetEnumNextHops = ctypes.windll.rtm.RtmGetEnumNextHops
RtmGetEnumNextHops.restype = wintypes.DWORD
RtmGetEnumNextHops.argtypes = [
    ctypes.c_ssize_t,  # RtmRegHandle : INT_PTR
    ctypes.c_ssize_t,  # EnumHandle : INT_PTR
    ctypes.POINTER(wintypes.DWORD),  # NumNextHops : DWORD* in/out
    ctypes.POINTER(ctypes.c_ssize_t),  # NextHopHandles : INT_PTR* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('rtm.dll')
RtmGetEnumNextHops = Fiddle::Function.new(
  lib['RtmGetEnumNextHops'],
  [
    Fiddle::TYPE_INTPTR_T,  # RtmRegHandle : INT_PTR
    Fiddle::TYPE_INTPTR_T,  # EnumHandle : INT_PTR
    Fiddle::TYPE_VOIDP,  # NumNextHops : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # NextHopHandles : INT_PTR* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "rtm")]
extern "system" {
    fn RtmGetEnumNextHops(
        RtmRegHandle: isize,  // INT_PTR
        EnumHandle: isize,  // INT_PTR
        NumNextHops: *mut u32,  // DWORD* in/out
        NextHopHandles: *mut isize  // INT_PTR* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("rtm.dll")]
public static extern uint RtmGetEnumNextHops(IntPtr RtmRegHandle, IntPtr EnumHandle, ref uint NumNextHops, ref IntPtr NextHopHandles);
"@
$api = Add-Type -MemberDefinition $sig -Name 'rtm_RtmGetEnumNextHops' -Namespace Win32 -PassThru
# $api::RtmGetEnumNextHops(RtmRegHandle, EnumHandle, NumNextHops, NextHopHandles)

#uselib "rtm.dll"
#func global RtmGetEnumNextHops "RtmGetEnumNextHops" sptr, sptr, sptr, sptr
; RtmGetEnumNextHops RtmRegHandle, EnumHandle, varptr(NumNextHops), varptr(NextHopHandles)   ; 戻り値は stat
; RtmRegHandle : INT_PTR -> "sptr"
; EnumHandle : INT_PTR -> "sptr"
; NumNextHops : DWORD* in/out -> "sptr"
; NextHopHandles : INT_PTR* in/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 "rtm.dll"
#cfunc global RtmGetEnumNextHops "RtmGetEnumNextHops" sptr, sptr, var, var
; res = RtmGetEnumNextHops(RtmRegHandle, EnumHandle, NumNextHops, NextHopHandles)
; RtmRegHandle : INT_PTR -> "sptr"
; EnumHandle : INT_PTR -> "sptr"
; NumNextHops : DWORD* in/out -> "var"
; NextHopHandles : INT_PTR* in/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 RtmGetEnumNextHops(INT_PTR RtmRegHandle, INT_PTR EnumHandle, DWORD* NumNextHops, INT_PTR* NextHopHandles)
#uselib "rtm.dll"
#cfunc global RtmGetEnumNextHops "RtmGetEnumNextHops" intptr, intptr, var, var
; res = RtmGetEnumNextHops(RtmRegHandle, EnumHandle, NumNextHops, NextHopHandles)
; RtmRegHandle : INT_PTR -> "intptr"
; EnumHandle : INT_PTR -> "intptr"
; NumNextHops : DWORD* in/out -> "var"
; NextHopHandles : INT_PTR* in/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 (
	rtm = windows.NewLazySystemDLL("rtm.dll")
	procRtmGetEnumNextHops = rtm.NewProc("RtmGetEnumNextHops")
)

// RtmRegHandle (INT_PTR), EnumHandle (INT_PTR), NumNextHops (DWORD* in/out), NextHopHandles (INT_PTR* in/out)
r1, _, err := procRtmGetEnumNextHops.Call(
	uintptr(RtmRegHandle),
	uintptr(EnumHandle),
	uintptr(NumNextHops),
	uintptr(NextHopHandles),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function RtmGetEnumNextHops(
  RtmRegHandle: NativeInt;   // INT_PTR
  EnumHandle: NativeInt;   // INT_PTR
  NumNextHops: Pointer;   // DWORD* in/out
  NextHopHandles: Pointer   // INT_PTR* in/out
): DWORD; stdcall;
  external 'rtm.dll' name 'RtmGetEnumNextHops';

result := DllCall("rtm\RtmGetEnumNextHops"
    , "Ptr", RtmRegHandle   ; INT_PTR
    , "Ptr", EnumHandle   ; INT_PTR
    , "Ptr", NumNextHops   ; DWORD* in/out
    , "Ptr", NextHopHandles   ; INT_PTR* in/out
    , "UInt")   ; return: DWORD

●RtmGetEnumNextHops(RtmRegHandle, EnumHandle, NumNextHops, NextHopHandles) = DLL("rtm.dll", "dword RtmGetEnumNextHops(int, int, void*, void*)")
# 呼び出し: RtmGetEnumNextHops(RtmRegHandle, EnumHandle, NumNextHops, NextHopHandles)
# RtmRegHandle : INT_PTR -> "int"
# EnumHandle : INT_PTR -> "int"
# NumNextHops : DWORD* in/out -> "void*"
# NextHopHandles : INT_PTR* 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)。