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。

#uselib "TRAFFIC.dll"
#cfunc global TcSetFlowW "TcSetFlowW" wstr, var, int, sptr
; res = TcSetFlowW(pFlowName, pGuidParam, BufferSize, Buffer)
; pFlowName : LPWSTR -> "wstr"
; pGuidParam : GUID* -> "var"
; BufferSize : DWORD -> "int"
; Buffer : void* -> "sptr"
; ※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 TcSetFlowW(LPWSTR pFlowName, GUID* pGuidParam, DWORD BufferSize, void* Buffer)
#uselib "TRAFFIC.dll"
#cfunc global TcSetFlowW "TcSetFlowW" wstr, var, int, intptr
; res = TcSetFlowW(pFlowName, pGuidParam, BufferSize, Buffer)
; pFlowName : LPWSTR -> "wstr"
; pGuidParam : GUID* -> "var"
; BufferSize : DWORD -> "int"
; Buffer : void* -> "intptr"
; ※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")
	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。