GetTcpStatisticsEx2

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

DWORD GetTcpStatisticsEx2(
    MIB_TCPSTATS2* Statistics,
    DWORD Family
);

<DllImport("IPHLPAPI.dll", ExactSpelling:=True)>
Public Shared Function GetTcpStatisticsEx2(
    Statistics As IntPtr,   ' MIB_TCPSTATS2* out
    Family As UInteger   ' DWORD
) As UInteger
End Function

' Statistics : MIB_TCPSTATS2* out
' Family : DWORD
Declare PtrSafe Function GetTcpStatisticsEx2 Lib "iphlpapi" ( _
    ByVal Statistics As LongPtr, _
    ByVal Family 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

GetTcpStatisticsEx2 = ctypes.windll.iphlpapi.GetTcpStatisticsEx2
GetTcpStatisticsEx2.restype = wintypes.DWORD
GetTcpStatisticsEx2.argtypes = [
    ctypes.c_void_p,  # Statistics : MIB_TCPSTATS2* out
    wintypes.DWORD,  # Family : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('IPHLPAPI.dll')
GetTcpStatisticsEx2 = Fiddle::Function.new(
  lib['GetTcpStatisticsEx2'],
  [
    Fiddle::TYPE_VOIDP,  # Statistics : MIB_TCPSTATS2* out
    -Fiddle::TYPE_INT,  # Family : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "iphlpapi")]
extern "system" {
    fn GetTcpStatisticsEx2(
        Statistics: *mut MIB_TCPSTATS2,  // MIB_TCPSTATS2* out
        Family: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("IPHLPAPI.dll")]
public static extern uint GetTcpStatisticsEx2(IntPtr Statistics, uint Family);
"@
$api = Add-Type -MemberDefinition $sig -Name 'IPHLPAPI_GetTcpStatisticsEx2' -Namespace Win32 -PassThru
# $api::GetTcpStatisticsEx2(Statistics, Family)

#uselib "IPHLPAPI.dll"
#func global GetTcpStatisticsEx2 "GetTcpStatisticsEx2" sptr, sptr
; GetTcpStatisticsEx2 varptr(Statistics), Family   ; 戻り値は stat
; Statistics : MIB_TCPSTATS2* out -> "sptr"
; Family : 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 GetTcpStatisticsEx2 "GetTcpStatisticsEx2" var, int
; res = GetTcpStatisticsEx2(Statistics, Family)
; Statistics : MIB_TCPSTATS2* out -> "var"
; Family : 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 GetTcpStatisticsEx2(MIB_TCPSTATS2* Statistics, DWORD Family)
#uselib "IPHLPAPI.dll"
#cfunc global GetTcpStatisticsEx2 "GetTcpStatisticsEx2" var, int
; res = GetTcpStatisticsEx2(Statistics, Family)
; Statistics : MIB_TCPSTATS2* out -> "var"
; Family : 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")
	procGetTcpStatisticsEx2 = iphlpapi.NewProc("GetTcpStatisticsEx2")
)

// Statistics (MIB_TCPSTATS2* out), Family (DWORD)
r1, _, err := procGetTcpStatisticsEx2.Call(
	uintptr(Statistics),
	uintptr(Family),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function GetTcpStatisticsEx2(
  Statistics: Pointer;   // MIB_TCPSTATS2* out
  Family: DWORD   // DWORD
): DWORD; stdcall;
  external 'IPHLPAPI.dll' name 'GetTcpStatisticsEx2';

result := DllCall("IPHLPAPI\GetTcpStatisticsEx2"
    , "Ptr", Statistics   ; MIB_TCPSTATS2* out
    , "UInt", Family   ; DWORD
    , "UInt")   ; return: DWORD

●GetTcpStatisticsEx2(Statistics, Family) = DLL("IPHLPAPI.dll", "dword GetTcpStatisticsEx2(void*, dword)")
# 呼び出し: GetTcpStatisticsEx2(Statistics, Family)
# Statistics : MIB_TCPSTATS2* out -> "void*"
# Family : 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)。