RtmCreateNextHopEnum

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

DWORD RtmCreateNextHopEnum(
    INT_PTR RtmRegHandle,
    DWORD EnumFlags,
    RTM_NET_ADDRESS* NetAddress,
    INT_PTR* RtmEnumHandle
);

<DllImport("rtm.dll", ExactSpelling:=True)>
Public Shared Function RtmCreateNextHopEnum(
    RtmRegHandle As IntPtr,   ' INT_PTR
    EnumFlags As UInteger,   ' DWORD
    NetAddress As IntPtr,   ' RTM_NET_ADDRESS* in/out
    ByRef RtmEnumHandle As IntPtr   ' INT_PTR* in/out
) As UInteger
End Function

' RtmRegHandle : INT_PTR
' EnumFlags : DWORD
' NetAddress : RTM_NET_ADDRESS* in/out
' RtmEnumHandle : INT_PTR* in/out
Declare PtrSafe Function RtmCreateNextHopEnum Lib "rtm" ( _
    ByVal RtmRegHandle As LongPtr, _
    ByVal EnumFlags As Long, _
    ByVal NetAddress As LongPtr, _
    ByRef RtmEnumHandle 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

RtmCreateNextHopEnum = ctypes.windll.rtm.RtmCreateNextHopEnum
RtmCreateNextHopEnum.restype = wintypes.DWORD
RtmCreateNextHopEnum.argtypes = [
    ctypes.c_ssize_t,  # RtmRegHandle : INT_PTR
    wintypes.DWORD,  # EnumFlags : DWORD
    ctypes.c_void_p,  # NetAddress : RTM_NET_ADDRESS* in/out
    ctypes.POINTER(ctypes.c_ssize_t),  # RtmEnumHandle : INT_PTR* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('rtm.dll')
RtmCreateNextHopEnum = Fiddle::Function.new(
  lib['RtmCreateNextHopEnum'],
  [
    Fiddle::TYPE_INTPTR_T,  # RtmRegHandle : INT_PTR
    -Fiddle::TYPE_INT,  # EnumFlags : DWORD
    Fiddle::TYPE_VOIDP,  # NetAddress : RTM_NET_ADDRESS* in/out
    Fiddle::TYPE_VOIDP,  # RtmEnumHandle : INT_PTR* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "rtm")]
extern "system" {
    fn RtmCreateNextHopEnum(
        RtmRegHandle: isize,  // INT_PTR
        EnumFlags: u32,  // DWORD
        NetAddress: *mut RTM_NET_ADDRESS,  // RTM_NET_ADDRESS* in/out
        RtmEnumHandle: *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 RtmCreateNextHopEnum(IntPtr RtmRegHandle, uint EnumFlags, IntPtr NetAddress, ref IntPtr RtmEnumHandle);
"@
$api = Add-Type -MemberDefinition $sig -Name 'rtm_RtmCreateNextHopEnum' -Namespace Win32 -PassThru
# $api::RtmCreateNextHopEnum(RtmRegHandle, EnumFlags, NetAddress, RtmEnumHandle)

#uselib "rtm.dll"
#func global RtmCreateNextHopEnum "RtmCreateNextHopEnum" sptr, sptr, sptr, sptr
; RtmCreateNextHopEnum RtmRegHandle, EnumFlags, varptr(NetAddress), varptr(RtmEnumHandle)   ; 戻り値は stat
; RtmRegHandle : INT_PTR -> "sptr"
; EnumFlags : DWORD -> "sptr"
; NetAddress : RTM_NET_ADDRESS* in/out -> "sptr"
; RtmEnumHandle : 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 RtmCreateNextHopEnum "RtmCreateNextHopEnum" sptr, int, var, var
; res = RtmCreateNextHopEnum(RtmRegHandle, EnumFlags, NetAddress, RtmEnumHandle)
; RtmRegHandle : INT_PTR -> "sptr"
; EnumFlags : DWORD -> "int"
; NetAddress : RTM_NET_ADDRESS* in/out -> "var"
; RtmEnumHandle : 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 RtmCreateNextHopEnum(INT_PTR RtmRegHandle, DWORD EnumFlags, RTM_NET_ADDRESS* NetAddress, INT_PTR* RtmEnumHandle)
#uselib "rtm.dll"
#cfunc global RtmCreateNextHopEnum "RtmCreateNextHopEnum" intptr, int, var, var
; res = RtmCreateNextHopEnum(RtmRegHandle, EnumFlags, NetAddress, RtmEnumHandle)
; RtmRegHandle : INT_PTR -> "intptr"
; EnumFlags : DWORD -> "int"
; NetAddress : RTM_NET_ADDRESS* in/out -> "var"
; RtmEnumHandle : 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")
	procRtmCreateNextHopEnum = rtm.NewProc("RtmCreateNextHopEnum")
)

// RtmRegHandle (INT_PTR), EnumFlags (DWORD), NetAddress (RTM_NET_ADDRESS* in/out), RtmEnumHandle (INT_PTR* in/out)
r1, _, err := procRtmCreateNextHopEnum.Call(
	uintptr(RtmRegHandle),
	uintptr(EnumFlags),
	uintptr(NetAddress),
	uintptr(RtmEnumHandle),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function RtmCreateNextHopEnum(
  RtmRegHandle: NativeInt;   // INT_PTR
  EnumFlags: DWORD;   // DWORD
  NetAddress: Pointer;   // RTM_NET_ADDRESS* in/out
  RtmEnumHandle: Pointer   // INT_PTR* in/out
): DWORD; stdcall;
  external 'rtm.dll' name 'RtmCreateNextHopEnum';

result := DllCall("rtm\RtmCreateNextHopEnum"
    , "Ptr", RtmRegHandle   ; INT_PTR
    , "UInt", EnumFlags   ; DWORD
    , "Ptr", NetAddress   ; RTM_NET_ADDRESS* in/out
    , "Ptr", RtmEnumHandle   ; INT_PTR* in/out
    , "UInt")   ; return: DWORD

●RtmCreateNextHopEnum(RtmRegHandle, EnumFlags, NetAddress, RtmEnumHandle) = DLL("rtm.dll", "dword RtmCreateNextHopEnum(int, dword, void*, void*)")
# 呼び出し: RtmCreateNextHopEnum(RtmRegHandle, EnumFlags, NetAddress, RtmEnumHandle)
# RtmRegHandle : INT_PTR -> "int"
# EnumFlags : DWORD -> "dword"
# NetAddress : RTM_NET_ADDRESS* in/out -> "void*"
# RtmEnumHandle : 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)。