PdhEnumLogSetNamesW

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

DWORD PdhEnumLogSetNamesW(
    LPCWSTR szDataSource,
    LPWSTR mszDataSetNameList,   // optional
    DWORD* pcchBufferLength
);

<DllImport("pdh.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function PdhEnumLogSetNamesW(
    <MarshalAs(UnmanagedType.LPWStr)> szDataSource As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> mszDataSetNameList As System.Text.StringBuilder,   ' LPWSTR optional, out
    ByRef pcchBufferLength As UInteger   ' DWORD* in/out
) As UInteger
End Function

' szDataSource : LPCWSTR
' mszDataSetNameList : LPWSTR optional, out
' pcchBufferLength : DWORD* in/out
Declare PtrSafe Function PdhEnumLogSetNamesW Lib "pdh" ( _
    ByVal szDataSource As LongPtr, _
    ByVal mszDataSetNameList As LongPtr, _
    ByRef pcchBufferLength As Long) 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

PdhEnumLogSetNamesW = ctypes.windll.pdh.PdhEnumLogSetNamesW
PdhEnumLogSetNamesW.restype = wintypes.DWORD
PdhEnumLogSetNamesW.argtypes = [
    wintypes.LPCWSTR,  # szDataSource : LPCWSTR
    wintypes.LPWSTR,  # mszDataSetNameList : LPWSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchBufferLength : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('pdh.dll')
PdhEnumLogSetNamesW = Fiddle::Function.new(
  lib['PdhEnumLogSetNamesW'],
  [
    Fiddle::TYPE_VOIDP,  # szDataSource : LPCWSTR
    Fiddle::TYPE_VOIDP,  # mszDataSetNameList : LPWSTR optional, out
    Fiddle::TYPE_VOIDP,  # pcchBufferLength : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "pdh")]
extern "system" {
    fn PdhEnumLogSetNamesW(
        szDataSource: *const u16,  // LPCWSTR
        mszDataSetNameList: *mut u16,  // LPWSTR optional, out
        pcchBufferLength: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("pdh.dll", CharSet = CharSet.Unicode)]
public static extern uint PdhEnumLogSetNamesW([MarshalAs(UnmanagedType.LPWStr)] string szDataSource, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder mszDataSetNameList, ref uint pcchBufferLength);
"@
$api = Add-Type -MemberDefinition $sig -Name 'pdh_PdhEnumLogSetNamesW' -Namespace Win32 -PassThru
# $api::PdhEnumLogSetNamesW(szDataSource, mszDataSetNameList, pcchBufferLength)

#uselib "pdh.dll"
#func global PdhEnumLogSetNamesW "PdhEnumLogSetNamesW" wptr, wptr, wptr
; PdhEnumLogSetNamesW szDataSource, varptr(mszDataSetNameList), varptr(pcchBufferLength)   ; 戻り値は stat
; szDataSource : LPCWSTR -> "wptr"
; mszDataSetNameList : LPWSTR optional, out -> "wptr"
; pcchBufferLength : DWORD* in/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。

#uselib "pdh.dll"
#cfunc global PdhEnumLogSetNamesW "PdhEnumLogSetNamesW" wstr, var, var
; res = PdhEnumLogSetNamesW(szDataSource, mszDataSetNameList, pcchBufferLength)
; szDataSource : LPCWSTR -> "wstr"
; mszDataSetNameList : LPWSTR optional, out -> "var"
; pcchBufferLength : DWORD* in/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 PdhEnumLogSetNamesW(LPCWSTR szDataSource, LPWSTR mszDataSetNameList, DWORD* pcchBufferLength)
#uselib "pdh.dll"
#cfunc global PdhEnumLogSetNamesW "PdhEnumLogSetNamesW" wstr, var, var
; res = PdhEnumLogSetNamesW(szDataSource, mszDataSetNameList, pcchBufferLength)
; szDataSource : LPCWSTR -> "wstr"
; mszDataSetNameList : LPWSTR optional, out -> "var"
; pcchBufferLength : DWORD* in/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 (
	pdh = windows.NewLazySystemDLL("pdh.dll")
	procPdhEnumLogSetNamesW = pdh.NewProc("PdhEnumLogSetNamesW")
)

// szDataSource (LPCWSTR), mszDataSetNameList (LPWSTR optional, out), pcchBufferLength (DWORD* in/out)
r1, _, err := procPdhEnumLogSetNamesW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szDataSource))),
	uintptr(mszDataSetNameList),
	uintptr(pcchBufferLength),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PdhEnumLogSetNamesW(
  szDataSource: PWideChar;   // LPCWSTR
  mszDataSetNameList: PWideChar;   // LPWSTR optional, out
  pcchBufferLength: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'pdh.dll' name 'PdhEnumLogSetNamesW';

result := DllCall("pdh\PdhEnumLogSetNamesW"
    , "WStr", szDataSource   ; LPCWSTR
    , "Ptr", mszDataSetNameList   ; LPWSTR optional, out
    , "Ptr", pcchBufferLength   ; DWORD* in/out
    , "UInt")   ; return: DWORD

●PdhEnumLogSetNamesW(szDataSource, mszDataSetNameList, pcchBufferLength) = DLL("pdh.dll", "dword PdhEnumLogSetNamesW(char*, char*, void*)")
# 呼び出し: PdhEnumLogSetNamesW(szDataSource, mszDataSetNameList, pcchBufferLength)
# szDataSource : LPCWSTR -> "char*"
# mszDataSetNameList : LPWSTR optional, out -> "char*"
# pcchBufferLength : DWORD* in/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。