TcQueryFlowW

// TRAFFIC.dll  (Unicode / -W)
#include <windows.h>

DWORD TcQueryFlowW(
    LPWSTR pFlowName,
    GUID* pGuidParam,
    DWORD* pBufferSize,
    void* Buffer
);

<DllImport("TRAFFIC.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function TcQueryFlowW(
    <MarshalAs(UnmanagedType.LPWStr)> pFlowName As String,   ' LPWSTR
    ByRef pGuidParam As Guid,   ' GUID*
    ByRef pBufferSize As UInteger,   ' DWORD* in/out
    Buffer As IntPtr   ' void* out
) As UInteger
End Function

' pFlowName : LPWSTR
' pGuidParam : GUID*
' pBufferSize : DWORD* in/out
' Buffer : void* out
Declare PtrSafe Function TcQueryFlowW Lib "traffic" ( _
    ByVal pFlowName As LongPtr, _
    ByVal pGuidParam As LongPtr, _
    ByRef pBufferSize As Long, _
    ByVal Buffer As LongPtr) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

TcQueryFlowW = ctypes.windll.traffic.TcQueryFlowW
TcQueryFlowW.restype = wintypes.DWORD
TcQueryFlowW.argtypes = [
    wintypes.LPCWSTR,  # pFlowName : LPWSTR
    ctypes.c_void_p,  # pGuidParam : GUID*
    ctypes.POINTER(wintypes.DWORD),  # pBufferSize : DWORD* in/out
    ctypes.POINTER(None),  # Buffer : void* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('TRAFFIC.dll')
TcQueryFlowW = Fiddle::Function.new(
  lib['TcQueryFlowW'],
  [
    Fiddle::TYPE_VOIDP,  # pFlowName : LPWSTR
    Fiddle::TYPE_VOIDP,  # pGuidParam : GUID*
    Fiddle::TYPE_VOIDP,  # pBufferSize : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # Buffer : void* out
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "traffic")]
extern "system" {
    fn TcQueryFlowW(
        pFlowName: *mut u16,  // LPWSTR
        pGuidParam: *mut GUID,  // GUID*
        pBufferSize: *mut u32,  // DWORD* in/out
        Buffer: *mut ()  // void* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("TRAFFIC.dll", CharSet = CharSet.Unicode)]
public static extern uint TcQueryFlowW([MarshalAs(UnmanagedType.LPWStr)] string pFlowName, ref Guid pGuidParam, ref uint pBufferSize, IntPtr Buffer);
"@
$api = Add-Type -MemberDefinition $sig -Name 'TRAFFIC_TcQueryFlowW' -Namespace Win32 -PassThru
# $api::TcQueryFlowW(pFlowName, pGuidParam, pBufferSize, Buffer)

#uselib "TRAFFIC.dll"
#func global TcQueryFlowW "TcQueryFlowW" wptr, wptr, wptr, wptr
; TcQueryFlowW pFlowName, varptr(pGuidParam), varptr(pBufferSize), Buffer   ; 戻り値は stat
; pFlowName : LPWSTR -> "wptr"
; pGuidParam : GUID* -> "wptr"
; pBufferSize : DWORD* in/out -> "wptr"
; Buffer : void* out -> "wptr"
; ※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。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	traffic = windows.NewLazySystemDLL("TRAFFIC.dll")
	procTcQueryFlowW = traffic.NewProc("TcQueryFlowW")
)

// pFlowName (LPWSTR), pGuidParam (GUID*), pBufferSize (DWORD* in/out), Buffer (void* out)
r1, _, err := procTcQueryFlowW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pFlowName))),
	uintptr(pGuidParam),
	uintptr(pBufferSize),
	uintptr(Buffer),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function TcQueryFlowW(
  pFlowName: PWideChar;   // LPWSTR
  pGuidParam: PGUID;   // GUID*
  pBufferSize: Pointer;   // DWORD* in/out
  Buffer: Pointer   // void* out
): DWORD; stdcall;
  external 'TRAFFIC.dll' name 'TcQueryFlowW';

result := DllCall("TRAFFIC\TcQueryFlowW"
    , "WStr", pFlowName   ; LPWSTR
    , "Ptr", pGuidParam   ; GUID*
    , "Ptr", pBufferSize   ; DWORD* in/out
    , "Ptr", Buffer   ; void* out
    , "UInt")   ; return: DWORD

●TcQueryFlowW(pFlowName, pGuidParam, pBufferSize, Buffer) = DLL("TRAFFIC.dll", "dword TcQueryFlowW(char*, void*, void*, void*)")
# 呼び出し: TcQueryFlowW(pFlowName, pGuidParam, pBufferSize, Buffer)
# pFlowName : LPWSTR -> "char*"
# pGuidParam : GUID* -> "void*"
# pBufferSize : DWORD* in/out -> "void*"
# Buffer : void* 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。

const std = @import("std");

extern "traffic" fn TcQueryFlowW(
    pFlowName: [*c]const u16, // LPWSTR
    pGuidParam: [*c]GUID, // GUID*
    pBufferSize: [*c]u32, // DWORD* in/out
    Buffer: ?*anyopaque // void* out
) callconv(std.os.windows.WINAPI) u32;
// Unicode(-W): UTF-16LE のヌル終端バッファ([*c]const u16)を渡す。

proc TcQueryFlowW(
    pFlowName: WideCString,  # LPWSTR
    pGuidParam: ptr GUID,  # GUID*
    pBufferSize: ptr uint32,  # DWORD* in/out
    Buffer: pointer  # void* out
): uint32 {.importc: "TcQueryFlowW", stdcall, dynlib: "TRAFFIC.dll".}
# Unicode(-W): WideCString は newWideCString("...") で生成。

pragma(lib, "traffic");
extern(Windows)
uint TcQueryFlowW(
    const(wchar)* pFlowName,   // LPWSTR
    GUID* pGuidParam,   // GUID*
    uint* pBufferSize,   // DWORD* in/out
    void* Buffer   // void* out
);

ccall((:TcQueryFlowW, "TRAFFIC.dll"), stdcall, UInt32,
      (Cwstring, Ptr{GUID}, Ptr{UInt32}, Ptr{Cvoid}),
      pFlowName, pGuidParam, pBufferSize, Buffer)
# pFlowName : LPWSTR -> Cwstring
# pGuidParam : GUID* -> Ptr{GUID}
# pBufferSize : DWORD* in/out -> Ptr{UInt32}
# Buffer : void* out -> Ptr{Cvoid}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
# Unicode(-W): Cwstring には transcode(UInt16, "...") 等で UTF-16 を渡す。

local ffi = require("ffi")
ffi.cdef[[
uint32_t TcQueryFlowW(
    const uint16_t* pFlowName,
    void* pGuidParam,
    uint32_t* pBufferSize,
    void* Buffer);
]]
local traffic = ffi.load("traffic")
-- traffic.TcQueryFlowW(pFlowName, pGuidParam, pBufferSize, Buffer)
-- pFlowName : LPWSTR
-- pGuidParam : GUID*
-- pBufferSize : DWORD* in/out
-- Buffer : void* out
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
-- Unicode(-W): uint16_t* には UTF-16LE のバッファ(ffi.new("uint16_t[?]", ...))を渡す。

const koffi = require('koffi');
const lib = koffi.load('TRAFFIC.dll');
const TcQueryFlowW = lib.func('__stdcall', 'TcQueryFlowW', 'uint32_t', ['str16', 'void *', 'uint32_t *', 'void *']);
// TcQueryFlowW(pFlowName, pGuidParam, pBufferSize, Buffer)
// pFlowName : LPWSTR -> 'str16'
// pGuidParam : GUID* -> 'void *'
// pBufferSize : DWORD* in/out -> 'uint32_t *'
// Buffer : void* out -> 'void *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("TRAFFIC.dll", {
  TcQueryFlowW: { parameters: ["buffer", "pointer", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.TcQueryFlowW(pFlowName, pGuidParam, pBufferSize, Buffer)
// pFlowName : LPWSTR -> "buffer"
// pGuidParam : GUID* -> "pointer"
// pBufferSize : DWORD* in/out -> "pointer"
// Buffer : void* out -> "pointer"
// 文字列は "buffer"。Unicode(-W) は new TextEncoder() ではなく UTF-16LE のバイト列(末尾に \x00\x00)を Uint8Array で渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
uint32_t TcQueryFlowW(
    const uint16_t* pFlowName,
    void* pGuidParam,
    uint32_t* pBufferSize,
    void* Buffer);
C, "TRAFFIC.dll");
// $ffi->TcQueryFlowW(pFlowName, pGuidParam, pBufferSize, Buffer);
// pFlowName : LPWSTR
// pGuidParam : GUID*
// pBufferSize : DWORD* in/out
// Buffer : void* out
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Traffic extends StdCallLibrary {
    Traffic INSTANCE = Native.load("traffic", Traffic.class, W32APIOptions.UNICODE_OPTIONS);
    int TcQueryFlowW(
        WString pFlowName,   // LPWSTR
        Pointer pGuidParam,   // GUID*
        IntByReference pBufferSize,   // DWORD* in/out
        Pointer Buffer   // void* out
    );
}
// Unicode(-W): WString(入力)/char[](出力)で UTF-16 をマーシャリング。

@[Link("traffic")]
lib LibTRAFFIC
  fun TcQueryFlowW = TcQueryFlowW(
    pFlowName : UInt16*,   # LPWSTR
    pGuidParam : GUID*,   # GUID*
    pBufferSize : UInt32*,   # DWORD* in/out
    Buffer : Void*   # void* out
  ) : UInt32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef TcQueryFlowWNative = Uint32 Function(Pointer<Utf16>, Pointer<Void>, Pointer<Uint32>, Pointer<Void>);
typedef TcQueryFlowWDart = int Function(Pointer<Utf16>, Pointer<Void>, Pointer<Uint32>, Pointer<Void>);
final TcQueryFlowW = DynamicLibrary.open('TRAFFIC.dll')
    .lookupFunction<TcQueryFlowWNative, TcQueryFlowWDart>('TcQueryFlowW');
// pFlowName : LPWSTR -> Pointer<Utf16>
// pGuidParam : GUID* -> Pointer<Void>
// pBufferSize : DWORD* in/out -> Pointer<Uint32>
// Buffer : void* out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function TcQueryFlowW(
  pFlowName: PWideChar;   // LPWSTR
  pGuidParam: PGUID;   // GUID*
  pBufferSize: Pointer;   // DWORD* in/out
  Buffer: Pointer   // void* out
): DWORD; stdcall;
  external 'TRAFFIC.dll' name 'TcQueryFlowW';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "TcQueryFlowW"
  c_TcQueryFlowW :: CWString -> Ptr () -> Ptr Word32 -> Ptr () -> IO Word32
-- pFlowName : LPWSTR -> CWString
-- pGuidParam : GUID* -> Ptr ()
-- pBufferSize : DWORD* in/out -> Ptr Word32
-- Buffer : void* out -> Ptr ()
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let tcqueryfloww =
  foreign "TcQueryFlowW"
    ((ptr uint16_t) @-> (ptr void) @-> (ptr uint32_t) @-> (ptr void) @-> returning uint32_t)
(* pFlowName : LPWSTR -> (ptr uint16_t) *)
(* pGuidParam : GUID* -> (ptr void) *)
(* pBufferSize : DWORD* in/out -> (ptr uint32_t) *)
(* Buffer : void* out -> (ptr void) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library traffic (t "TRAFFIC.dll"))
(cffi:use-foreign-library traffic)

(cffi:defcfun ("TcQueryFlowW" tc-query-flow-w :convention :stdcall) :uint32
  (p-flow-name (:string :encoding :utf-16le))   ; LPWSTR
  (p-guid-param :pointer)   ; GUID*
  (p-buffer-size :pointer)   ; DWORD* in/out
  (buffer :pointer))   ; void* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $TcQueryFlowW = Win32::API::More->new('TRAFFIC',
    'DWORD TcQueryFlowW(LPCWSTR pFlowName, LPVOID pGuidParam, LPVOID pBufferSize, LPVOID Buffer)');
# my $ret = $TcQueryFlowW->Call($pFlowName, $pGuidParam, $pBufferSize, $Buffer);
# pFlowName : LPWSTR -> LPCWSTR
# pGuidParam : GUID* -> LPVOID
# pBufferSize : DWORD* in/out -> LPVOID
# Buffer : void* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。
# Unicode(-W): LPCWSTR/LPWSTR は Win32::API が UTF-16 変換を行う。