PfGetInterfaceStatistics

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

DWORD PfGetInterfaceStatistics(
    void* pInterface,
    PF_INTERFACE_STATS* ppfStats,
    DWORD* pdwBufferSize,
    BOOL fResetCounters
);

<DllImport("IPHLPAPI.dll", ExactSpelling:=True)>
Public Shared Function PfGetInterfaceStatistics(
    pInterface As IntPtr,   ' void* in/out
    ppfStats As IntPtr,   ' PF_INTERFACE_STATS* in/out
    ByRef pdwBufferSize As UInteger,   ' DWORD* in/out
    fResetCounters As Boolean   ' BOOL
) As UInteger
End Function

' pInterface : void* in/out
' ppfStats : PF_INTERFACE_STATS* in/out
' pdwBufferSize : DWORD* in/out
' fResetCounters : BOOL
Declare PtrSafe Function PfGetInterfaceStatistics Lib "iphlpapi" ( _
    ByVal pInterface As LongPtr, _
    ByVal ppfStats As LongPtr, _
    ByRef pdwBufferSize As Long, _
    ByVal fResetCounters 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

PfGetInterfaceStatistics = ctypes.windll.iphlpapi.PfGetInterfaceStatistics
PfGetInterfaceStatistics.restype = wintypes.DWORD
PfGetInterfaceStatistics.argtypes = [
    ctypes.POINTER(None),  # pInterface : void* in/out
    ctypes.c_void_p,  # ppfStats : PF_INTERFACE_STATS* in/out
    ctypes.POINTER(wintypes.DWORD),  # pdwBufferSize : DWORD* in/out
    wintypes.BOOL,  # fResetCounters : BOOL
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('IPHLPAPI.dll')
PfGetInterfaceStatistics = Fiddle::Function.new(
  lib['PfGetInterfaceStatistics'],
  [
    Fiddle::TYPE_VOIDP,  # pInterface : void* in/out
    Fiddle::TYPE_VOIDP,  # ppfStats : PF_INTERFACE_STATS* in/out
    Fiddle::TYPE_VOIDP,  # pdwBufferSize : DWORD* in/out
    Fiddle::TYPE_INT,  # fResetCounters : BOOL
  ],
  -Fiddle::TYPE_INT)

#[link(name = "iphlpapi")]
extern "system" {
    fn PfGetInterfaceStatistics(
        pInterface: *mut (),  // void* in/out
        ppfStats: *mut PF_INTERFACE_STATS,  // PF_INTERFACE_STATS* in/out
        pdwBufferSize: *mut u32,  // DWORD* in/out
        fResetCounters: i32  // BOOL
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("IPHLPAPI.dll")]
public static extern uint PfGetInterfaceStatistics(IntPtr pInterface, IntPtr ppfStats, ref uint pdwBufferSize, bool fResetCounters);
"@
$api = Add-Type -MemberDefinition $sig -Name 'IPHLPAPI_PfGetInterfaceStatistics' -Namespace Win32 -PassThru
# $api::PfGetInterfaceStatistics(pInterface, ppfStats, pdwBufferSize, fResetCounters)

#uselib "IPHLPAPI.dll"
#func global PfGetInterfaceStatistics "PfGetInterfaceStatistics" sptr, sptr, sptr, sptr
; PfGetInterfaceStatistics pInterface, varptr(ppfStats), varptr(pdwBufferSize), fResetCounters   ; 戻り値は stat
; pInterface : void* in/out -> "sptr"
; ppfStats : PF_INTERFACE_STATS* in/out -> "sptr"
; pdwBufferSize : DWORD* in/out -> "sptr"
; fResetCounters : BOOL -> "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 PfGetInterfaceStatistics "PfGetInterfaceStatistics" sptr, var, var, int
; res = PfGetInterfaceStatistics(pInterface, ppfStats, pdwBufferSize, fResetCounters)
; pInterface : void* in/out -> "sptr"
; ppfStats : PF_INTERFACE_STATS* in/out -> "var"
; pdwBufferSize : DWORD* in/out -> "var"
; fResetCounters : BOOL -> "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 PfGetInterfaceStatistics(void* pInterface, PF_INTERFACE_STATS* ppfStats, DWORD* pdwBufferSize, BOOL fResetCounters)
#uselib "IPHLPAPI.dll"
#cfunc global PfGetInterfaceStatistics "PfGetInterfaceStatistics" intptr, var, var, int
; res = PfGetInterfaceStatistics(pInterface, ppfStats, pdwBufferSize, fResetCounters)
; pInterface : void* in/out -> "intptr"
; ppfStats : PF_INTERFACE_STATS* in/out -> "var"
; pdwBufferSize : DWORD* in/out -> "var"
; fResetCounters : BOOL -> "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")
	procPfGetInterfaceStatistics = iphlpapi.NewProc("PfGetInterfaceStatistics")
)

// pInterface (void* in/out), ppfStats (PF_INTERFACE_STATS* in/out), pdwBufferSize (DWORD* in/out), fResetCounters (BOOL)
r1, _, err := procPfGetInterfaceStatistics.Call(
	uintptr(pInterface),
	uintptr(ppfStats),
	uintptr(pdwBufferSize),
	uintptr(fResetCounters),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PfGetInterfaceStatistics(
  pInterface: Pointer;   // void* in/out
  ppfStats: Pointer;   // PF_INTERFACE_STATS* in/out
  pdwBufferSize: Pointer;   // DWORD* in/out
  fResetCounters: BOOL   // BOOL
): DWORD; stdcall;
  external 'IPHLPAPI.dll' name 'PfGetInterfaceStatistics';

result := DllCall("IPHLPAPI\PfGetInterfaceStatistics"
    , "Ptr", pInterface   ; void* in/out
    , "Ptr", ppfStats   ; PF_INTERFACE_STATS* in/out
    , "Ptr", pdwBufferSize   ; DWORD* in/out
    , "Int", fResetCounters   ; BOOL
    , "UInt")   ; return: DWORD

●PfGetInterfaceStatistics(pInterface, ppfStats, pdwBufferSize, fResetCounters) = DLL("IPHLPAPI.dll", "dword PfGetInterfaceStatistics(void*, void*, void*, bool)")
# 呼び出し: PfGetInterfaceStatistics(pInterface, ppfStats, pdwBufferSize, fResetCounters)
# pInterface : void* in/out -> "void*"
# ppfStats : PF_INTERFACE_STATS* in/out -> "void*"
# pdwBufferSize : DWORD* in/out -> "void*"
# fResetCounters : BOOL -> "bool"
# 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)。