TcEnumerateInterfaces

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

DWORD TcEnumerateInterfaces(
    HANDLE ClientHandle,
    DWORD* pBufferSize,
    TC_IFC_DESCRIPTOR* InterfaceBuffer
);

<DllImport("TRAFFIC.dll", ExactSpelling:=True)>
Public Shared Function TcEnumerateInterfaces(
    ClientHandle As IntPtr,   ' HANDLE
    ByRef pBufferSize As UInteger,   ' DWORD* in/out
    InterfaceBuffer As IntPtr   ' TC_IFC_DESCRIPTOR* out
) As UInteger
End Function

' ClientHandle : HANDLE
' pBufferSize : DWORD* in/out
' InterfaceBuffer : TC_IFC_DESCRIPTOR* out
Declare PtrSafe Function TcEnumerateInterfaces Lib "traffic" ( _
    ByVal ClientHandle As LongPtr, _
    ByRef pBufferSize As Long, _
    ByVal InterfaceBuffer 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

TcEnumerateInterfaces = ctypes.windll.traffic.TcEnumerateInterfaces
TcEnumerateInterfaces.restype = wintypes.DWORD
TcEnumerateInterfaces.argtypes = [
    wintypes.HANDLE,  # ClientHandle : HANDLE
    ctypes.POINTER(wintypes.DWORD),  # pBufferSize : DWORD* in/out
    ctypes.c_void_p,  # InterfaceBuffer : TC_IFC_DESCRIPTOR* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('TRAFFIC.dll')
TcEnumerateInterfaces = Fiddle::Function.new(
  lib['TcEnumerateInterfaces'],
  [
    Fiddle::TYPE_VOIDP,  # ClientHandle : HANDLE
    Fiddle::TYPE_VOIDP,  # pBufferSize : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # InterfaceBuffer : TC_IFC_DESCRIPTOR* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "traffic")]
extern "system" {
    fn TcEnumerateInterfaces(
        ClientHandle: *mut core::ffi::c_void,  // HANDLE
        pBufferSize: *mut u32,  // DWORD* in/out
        InterfaceBuffer: *mut TC_IFC_DESCRIPTOR  // TC_IFC_DESCRIPTOR* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("TRAFFIC.dll")]
public static extern uint TcEnumerateInterfaces(IntPtr ClientHandle, ref uint pBufferSize, IntPtr InterfaceBuffer);
"@
$api = Add-Type -MemberDefinition $sig -Name 'TRAFFIC_TcEnumerateInterfaces' -Namespace Win32 -PassThru
# $api::TcEnumerateInterfaces(ClientHandle, pBufferSize, InterfaceBuffer)

#uselib "TRAFFIC.dll"
#func global TcEnumerateInterfaces "TcEnumerateInterfaces" sptr, sptr, sptr
; TcEnumerateInterfaces ClientHandle, varptr(pBufferSize), varptr(InterfaceBuffer)   ; 戻り値は stat
; ClientHandle : HANDLE -> "sptr"
; pBufferSize : DWORD* in/out -> "sptr"
; InterfaceBuffer : TC_IFC_DESCRIPTOR* 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 "TRAFFIC.dll"
#cfunc global TcEnumerateInterfaces "TcEnumerateInterfaces" sptr, var, var
; res = TcEnumerateInterfaces(ClientHandle, pBufferSize, InterfaceBuffer)
; ClientHandle : HANDLE -> "sptr"
; pBufferSize : DWORD* in/out -> "var"
; InterfaceBuffer : TC_IFC_DESCRIPTOR* 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 TcEnumerateInterfaces(HANDLE ClientHandle, DWORD* pBufferSize, TC_IFC_DESCRIPTOR* InterfaceBuffer)
#uselib "TRAFFIC.dll"
#cfunc global TcEnumerateInterfaces "TcEnumerateInterfaces" intptr, var, var
; res = TcEnumerateInterfaces(ClientHandle, pBufferSize, InterfaceBuffer)
; ClientHandle : HANDLE -> "intptr"
; pBufferSize : DWORD* in/out -> "var"
; InterfaceBuffer : TC_IFC_DESCRIPTOR* 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 (
	traffic = windows.NewLazySystemDLL("TRAFFIC.dll")
	procTcEnumerateInterfaces = traffic.NewProc("TcEnumerateInterfaces")
)

// ClientHandle (HANDLE), pBufferSize (DWORD* in/out), InterfaceBuffer (TC_IFC_DESCRIPTOR* out)
r1, _, err := procTcEnumerateInterfaces.Call(
	uintptr(ClientHandle),
	uintptr(pBufferSize),
	uintptr(InterfaceBuffer),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function TcEnumerateInterfaces(
  ClientHandle: THandle;   // HANDLE
  pBufferSize: Pointer;   // DWORD* in/out
  InterfaceBuffer: Pointer   // TC_IFC_DESCRIPTOR* out
): DWORD; stdcall;
  external 'TRAFFIC.dll' name 'TcEnumerateInterfaces';

result := DllCall("TRAFFIC\TcEnumerateInterfaces"
    , "Ptr", ClientHandle   ; HANDLE
    , "Ptr", pBufferSize   ; DWORD* in/out
    , "Ptr", InterfaceBuffer   ; TC_IFC_DESCRIPTOR* out
    , "UInt")   ; return: DWORD

●TcEnumerateInterfaces(ClientHandle, pBufferSize, InterfaceBuffer) = DLL("TRAFFIC.dll", "dword TcEnumerateInterfaces(void*, void*, void*)")
# 呼び出し: TcEnumerateInterfaces(ClientHandle, pBufferSize, InterfaceBuffer)
# ClientHandle : HANDLE -> "void*"
# pBufferSize : DWORD* in/out -> "void*"
# InterfaceBuffer : TC_IFC_DESCRIPTOR* 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)。