GetExtendedTcpTable

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

DWORD GetExtendedTcpTable(
    void* pTcpTable,   // optional
    DWORD* pdwSize,
    BOOL bOrder,
    DWORD ulAf,
    TCP_TABLE_CLASS TableClass,
    DWORD Reserved
);

<DllImport("IPHLPAPI.dll", ExactSpelling:=True)>
Public Shared Function GetExtendedTcpTable(
    pTcpTable As IntPtr,   ' void* optional, out
    ByRef pdwSize As UInteger,   ' DWORD* in/out
    bOrder As Boolean,   ' BOOL
    ulAf As UInteger,   ' DWORD
    TableClass As Integer,   ' TCP_TABLE_CLASS
    Reserved As UInteger   ' DWORD
) As UInteger
End Function

' pTcpTable : void* optional, out
' pdwSize : DWORD* in/out
' bOrder : BOOL
' ulAf : DWORD
' TableClass : TCP_TABLE_CLASS
' Reserved : DWORD
Declare PtrSafe Function GetExtendedTcpTable Lib "iphlpapi" ( _
    ByVal pTcpTable As LongPtr, _
    ByRef pdwSize As Long, _
    ByVal bOrder As Long, _
    ByVal ulAf As Long, _
    ByVal TableClass As Long, _
    ByVal Reserved 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

GetExtendedTcpTable = ctypes.windll.iphlpapi.GetExtendedTcpTable
GetExtendedTcpTable.restype = wintypes.DWORD
GetExtendedTcpTable.argtypes = [
    ctypes.POINTER(None),  # pTcpTable : void* optional, out
    ctypes.POINTER(wintypes.DWORD),  # pdwSize : DWORD* in/out
    wintypes.BOOL,  # bOrder : BOOL
    wintypes.DWORD,  # ulAf : DWORD
    ctypes.c_int,  # TableClass : TCP_TABLE_CLASS
    wintypes.DWORD,  # Reserved : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('IPHLPAPI.dll')
GetExtendedTcpTable = Fiddle::Function.new(
  lib['GetExtendedTcpTable'],
  [
    Fiddle::TYPE_VOIDP,  # pTcpTable : void* optional, out
    Fiddle::TYPE_VOIDP,  # pdwSize : DWORD* in/out
    Fiddle::TYPE_INT,  # bOrder : BOOL
    -Fiddle::TYPE_INT,  # ulAf : DWORD
    Fiddle::TYPE_INT,  # TableClass : TCP_TABLE_CLASS
    -Fiddle::TYPE_INT,  # Reserved : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "iphlpapi")]
extern "system" {
    fn GetExtendedTcpTable(
        pTcpTable: *mut (),  // void* optional, out
        pdwSize: *mut u32,  // DWORD* in/out
        bOrder: i32,  // BOOL
        ulAf: u32,  // DWORD
        TableClass: i32,  // TCP_TABLE_CLASS
        Reserved: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("IPHLPAPI.dll")]
public static extern uint GetExtendedTcpTable(IntPtr pTcpTable, ref uint pdwSize, bool bOrder, uint ulAf, int TableClass, uint Reserved);
"@
$api = Add-Type -MemberDefinition $sig -Name 'IPHLPAPI_GetExtendedTcpTable' -Namespace Win32 -PassThru
# $api::GetExtendedTcpTable(pTcpTable, pdwSize, bOrder, ulAf, TableClass, Reserved)

#uselib "IPHLPAPI.dll"
#func global GetExtendedTcpTable "GetExtendedTcpTable" sptr, sptr, sptr, sptr, sptr, sptr
; GetExtendedTcpTable pTcpTable, varptr(pdwSize), bOrder, ulAf, TableClass, Reserved   ; 戻り値は stat
; pTcpTable : void* optional, out -> "sptr"
; pdwSize : DWORD* in/out -> "sptr"
; bOrder : BOOL -> "sptr"
; ulAf : DWORD -> "sptr"
; TableClass : TCP_TABLE_CLASS -> "sptr"
; Reserved : DWORD -> "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 "IPHLPAPI.dll"
#cfunc global GetExtendedTcpTable "GetExtendedTcpTable" sptr, var, int, int, int, int
; res = GetExtendedTcpTable(pTcpTable, pdwSize, bOrder, ulAf, TableClass, Reserved)
; pTcpTable : void* optional, out -> "sptr"
; pdwSize : DWORD* in/out -> "var"
; bOrder : BOOL -> "int"
; ulAf : DWORD -> "int"
; TableClass : TCP_TABLE_CLASS -> "int"
; Reserved : DWORD -> "int"
; ※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 GetExtendedTcpTable(void* pTcpTable, DWORD* pdwSize, BOOL bOrder, DWORD ulAf, TCP_TABLE_CLASS TableClass, DWORD Reserved)
#uselib "IPHLPAPI.dll"
#cfunc global GetExtendedTcpTable "GetExtendedTcpTable" intptr, var, int, int, int, int
; res = GetExtendedTcpTable(pTcpTable, pdwSize, bOrder, ulAf, TableClass, Reserved)
; pTcpTable : void* optional, out -> "intptr"
; pdwSize : DWORD* in/out -> "var"
; bOrder : BOOL -> "int"
; ulAf : DWORD -> "int"
; TableClass : TCP_TABLE_CLASS -> "int"
; Reserved : DWORD -> "int"
; ※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 (
	iphlpapi = windows.NewLazySystemDLL("IPHLPAPI.dll")
	procGetExtendedTcpTable = iphlpapi.NewProc("GetExtendedTcpTable")
)

// pTcpTable (void* optional, out), pdwSize (DWORD* in/out), bOrder (BOOL), ulAf (DWORD), TableClass (TCP_TABLE_CLASS), Reserved (DWORD)
r1, _, err := procGetExtendedTcpTable.Call(
	uintptr(pTcpTable),
	uintptr(pdwSize),
	uintptr(bOrder),
	uintptr(ulAf),
	uintptr(TableClass),
	uintptr(Reserved),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function GetExtendedTcpTable(
  pTcpTable: Pointer;   // void* optional, out
  pdwSize: Pointer;   // DWORD* in/out
  bOrder: BOOL;   // BOOL
  ulAf: DWORD;   // DWORD
  TableClass: Integer;   // TCP_TABLE_CLASS
  Reserved: DWORD   // DWORD
): DWORD; stdcall;
  external 'IPHLPAPI.dll' name 'GetExtendedTcpTable';

result := DllCall("IPHLPAPI\GetExtendedTcpTable"
    , "Ptr", pTcpTable   ; void* optional, out
    , "Ptr", pdwSize   ; DWORD* in/out
    , "Int", bOrder   ; BOOL
    , "UInt", ulAf   ; DWORD
    , "Int", TableClass   ; TCP_TABLE_CLASS
    , "UInt", Reserved   ; DWORD
    , "UInt")   ; return: DWORD

●GetExtendedTcpTable(pTcpTable, pdwSize, bOrder, ulAf, TableClass, Reserved) = DLL("IPHLPAPI.dll", "dword GetExtendedTcpTable(void*, void*, bool, dword, int, dword)")
# 呼び出し: GetExtendedTcpTable(pTcpTable, pdwSize, bOrder, ulAf, TableClass, Reserved)
# pTcpTable : void* optional, out -> "void*"
# pdwSize : DWORD* in/out -> "void*"
# bOrder : BOOL -> "bool"
# ulAf : DWORD -> "dword"
# TableClass : TCP_TABLE_CLASS -> "int"
# Reserved : DWORD -> "dword"
# 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)。