TcSetFlowW

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

DWORD TcSetFlowW(
    LPWSTR pFlowName,
    GUID* pGuidParam,
    DWORD BufferSize,
    void* Buffer
);

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

' pFlowName : LPWSTR
' pGuidParam : GUID*
' BufferSize : DWORD
' Buffer : void*
Declare PtrSafe Function TcSetFlowW Lib "traffic" ( _
    ByVal pFlowName As LongPtr, _
    ByVal pGuidParam As LongPtr, _
    ByVal BufferSize 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

TcSetFlowW = ctypes.windll.traffic.TcSetFlowW
TcSetFlowW.restype = wintypes.DWORD
TcSetFlowW.argtypes = [
    wintypes.LPCWSTR,  # pFlowName : LPWSTR
    ctypes.c_void_p,  # pGuidParam : GUID*
    wintypes.DWORD,  # BufferSize : DWORD
    ctypes.POINTER(None),  # Buffer : void*
]

require 'fiddle'
require 'fiddle/import'

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

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

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

#uselib "TRAFFIC.dll"
#func global TcSetFlowW "TcSetFlowW" wptr, wptr, wptr, wptr
; TcSetFlowW pFlowName, varptr(pGuidParam), BufferSize, Buffer   ; 戻り値は stat
; pFlowName : LPWSTR -> "wptr"
; pGuidParam : GUID* -> "wptr"
; BufferSize : DWORD -> "wptr"
; Buffer : void* -> "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")
	procTcSetFlowW = traffic.NewProc("TcSetFlowW")
)

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

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

result := DllCall("TRAFFIC\TcSetFlowW"
    , "WStr", pFlowName   ; LPWSTR
    , "Ptr", pGuidParam   ; GUID*
    , "UInt", BufferSize   ; DWORD
    , "Ptr", Buffer   ; void*
    , "UInt")   ; return: DWORD

●TcSetFlowW(pFlowName, pGuidParam, BufferSize, Buffer) = DLL("TRAFFIC.dll", "dword TcSetFlowW(char*, void*, dword, void*)")
# 呼び出し: TcSetFlowW(pFlowName, pGuidParam, BufferSize, Buffer)
# pFlowName : LPWSTR -> "char*"
# pGuidParam : GUID* -> "void*"
# BufferSize : DWORD -> "dword"
# Buffer : void* -> "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 TcSetFlowW(
    pFlowName: [*c]const u16, // LPWSTR
    pGuidParam: [*c]GUID, // GUID*
    BufferSize: u32, // DWORD
    Buffer: ?*anyopaque // void*
) 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 TcSetFlowW(
    pFlowName: WideCString,  # LPWSTR
    pGuidParam: ptr GUID,  # GUID*
    BufferSize: uint32,  # DWORD
    Buffer: pointer  # void*
): uint32 {.importc: "TcSetFlowW", stdcall, dynlib: "TRAFFIC.dll".}
# Unicode(-W): WideCString は newWideCString("...") で生成。

pragma(lib, "traffic");
extern(Windows)
uint TcSetFlowW(
    const(wchar)* pFlowName,   // LPWSTR
    GUID* pGuidParam,   // GUID*
    uint BufferSize,   // DWORD
    void* Buffer   // void*
);

ccall((:TcSetFlowW, "TRAFFIC.dll"), stdcall, UInt32,
      (Cwstring, Ptr{GUID}, UInt32, Ptr{Cvoid}),
      pFlowName, pGuidParam, BufferSize, Buffer)
# pFlowName : LPWSTR -> Cwstring
# pGuidParam : GUID* -> Ptr{GUID}
# BufferSize : DWORD -> UInt32
# Buffer : void* -> 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 TcSetFlowW(
    const uint16_t* pFlowName,
    void* pGuidParam,
    uint32_t BufferSize,
    void* Buffer);
]]
local traffic = ffi.load("traffic")
-- traffic.TcSetFlowW(pFlowName, pGuidParam, BufferSize, Buffer)
-- pFlowName : LPWSTR
-- pGuidParam : GUID*
-- BufferSize : DWORD
-- Buffer : void*
-- 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 TcSetFlowW = lib.func('__stdcall', 'TcSetFlowW', 'uint32_t', ['str16', 'void *', 'uint32_t', 'void *']);
// TcSetFlowW(pFlowName, pGuidParam, BufferSize, Buffer)
// pFlowName : LPWSTR -> 'str16'
// pGuidParam : GUID* -> 'void *'
// BufferSize : DWORD -> 'uint32_t'
// Buffer : void* -> '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", {
  TcSetFlowW: { parameters: ["buffer", "pointer", "u32", "pointer"], result: "u32" },
});
// lib.symbols.TcSetFlowW(pFlowName, pGuidParam, BufferSize, Buffer)
// pFlowName : LPWSTR -> "buffer"
// pGuidParam : GUID* -> "pointer"
// BufferSize : DWORD -> "u32"
// Buffer : void* -> "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 TcSetFlowW(
    const uint16_t* pFlowName,
    void* pGuidParam,
    uint32_t BufferSize,
    void* Buffer);
C, "TRAFFIC.dll");
// $ffi->TcSetFlowW(pFlowName, pGuidParam, BufferSize, Buffer);
// pFlowName : LPWSTR
// pGuidParam : GUID*
// BufferSize : DWORD
// Buffer : void*
// 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 TcSetFlowW(
        WString pFlowName,   // LPWSTR
        Pointer pGuidParam,   // GUID*
        int BufferSize,   // DWORD
        Pointer Buffer   // void*
    );
}
// Unicode(-W): WString(入力)/char[](出力)で UTF-16 をマーシャリング。

@[Link("traffic")]
lib LibTRAFFIC
  fun TcSetFlowW = TcSetFlowW(
    pFlowName : UInt16*,   # LPWSTR
    pGuidParam : GUID*,   # GUID*
    BufferSize : UInt32,   # DWORD
    Buffer : Void*   # void*
  ) : 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 TcSetFlowWNative = Uint32 Function(Pointer<Utf16>, Pointer<Void>, Uint32, Pointer<Void>);
typedef TcSetFlowWDart = int Function(Pointer<Utf16>, Pointer<Void>, int, Pointer<Void>);
final TcSetFlowW = DynamicLibrary.open('TRAFFIC.dll')
    .lookupFunction<TcSetFlowWNative, TcSetFlowWDart>('TcSetFlowW');
// pFlowName : LPWSTR -> Pointer<Utf16>
// pGuidParam : GUID* -> Pointer<Void>
// BufferSize : DWORD -> Uint32
// Buffer : void* -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

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

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

foreign import stdcall safe "TcSetFlowW"
  c_TcSetFlowW :: CWString -> Ptr () -> Word32 -> Ptr () -> IO Word32
-- pFlowName : LPWSTR -> CWString
-- pGuidParam : GUID* -> Ptr ()
-- BufferSize : DWORD -> Word32
-- Buffer : void* -> 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 tcsetfloww =
  foreign "TcSetFlowW"
    ((ptr uint16_t) @-> (ptr void) @-> uint32_t @-> (ptr void) @-> returning uint32_t)
(* pFlowName : LPWSTR -> (ptr uint16_t) *)
(* pGuidParam : GUID* -> (ptr void) *)
(* BufferSize : DWORD -> uint32_t *)
(* Buffer : void* -> (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 ("TcSetFlowW" tc-set-flow-w :convention :stdcall) :uint32
  (p-flow-name (:string :encoding :utf-16le))   ; LPWSTR
  (p-guid-param :pointer)   ; GUID*
  (buffer-size :uint32)   ; DWORD
  (buffer :pointer))   ; void*
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $TcSetFlowW = Win32::API::More->new('TRAFFIC',
    'DWORD TcSetFlowW(LPCWSTR pFlowName, LPVOID pGuidParam, DWORD BufferSize, LPVOID Buffer)');
# my $ret = $TcSetFlowW->Call($pFlowName, $pGuidParam, $BufferSize, $Buffer);
# pFlowName : LPWSTR -> LPCWSTR
# pGuidParam : GUID* -> LPVOID
# BufferSize : DWORD -> DWORD
# Buffer : void* -> 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。