ReadEventLogW

// ADVAPI32.dll  (Unicode / -W)
#include <windows.h>

BOOL ReadEventLogW(
    HANDLE hEventLog,
    READ_EVENT_LOG_READ_FLAGS dwReadFlags,
    DWORD dwRecordOffset,
    void* lpBuffer,
    DWORD nNumberOfBytesToRead,
    DWORD* pnBytesRead,
    DWORD* pnMinNumberOfBytesNeeded
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function ReadEventLogW(
    hEventLog As IntPtr,   ' HANDLE
    dwReadFlags As UInteger,   ' READ_EVENT_LOG_READ_FLAGS
    dwRecordOffset As UInteger,   ' DWORD
    lpBuffer As IntPtr,   ' void* out
    nNumberOfBytesToRead As UInteger,   ' DWORD
    <Out> ByRef pnBytesRead As UInteger,   ' DWORD* out
    <Out> ByRef pnMinNumberOfBytesNeeded As UInteger   ' DWORD* out
) As Boolean
End Function

' hEventLog : HANDLE
' dwReadFlags : READ_EVENT_LOG_READ_FLAGS
' dwRecordOffset : DWORD
' lpBuffer : void* out
' nNumberOfBytesToRead : DWORD
' pnBytesRead : DWORD* out
' pnMinNumberOfBytesNeeded : DWORD* out
Declare PtrSafe Function ReadEventLogW Lib "advapi32" ( _
    ByVal hEventLog As LongPtr, _
    ByVal dwReadFlags As Long, _
    ByVal dwRecordOffset As Long, _
    ByVal lpBuffer As LongPtr, _
    ByVal nNumberOfBytesToRead As Long, _
    ByRef pnBytesRead As Long, _
    ByRef pnMinNumberOfBytesNeeded 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

ReadEventLogW = ctypes.windll.advapi32.ReadEventLogW
ReadEventLogW.restype = wintypes.BOOL
ReadEventLogW.argtypes = [
    wintypes.HANDLE,  # hEventLog : HANDLE
    wintypes.DWORD,  # dwReadFlags : READ_EVENT_LOG_READ_FLAGS
    wintypes.DWORD,  # dwRecordOffset : DWORD
    ctypes.POINTER(None),  # lpBuffer : void* out
    wintypes.DWORD,  # nNumberOfBytesToRead : DWORD
    ctypes.POINTER(wintypes.DWORD),  # pnBytesRead : DWORD* out
    ctypes.POINTER(wintypes.DWORD),  # pnMinNumberOfBytesNeeded : DWORD* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
ReadEventLogW = Fiddle::Function.new(
  lib['ReadEventLogW'],
  [
    Fiddle::TYPE_VOIDP,  # hEventLog : HANDLE
    -Fiddle::TYPE_INT,  # dwReadFlags : READ_EVENT_LOG_READ_FLAGS
    -Fiddle::TYPE_INT,  # dwRecordOffset : DWORD
    Fiddle::TYPE_VOIDP,  # lpBuffer : void* out
    -Fiddle::TYPE_INT,  # nNumberOfBytesToRead : DWORD
    Fiddle::TYPE_VOIDP,  # pnBytesRead : DWORD* out
    Fiddle::TYPE_VOIDP,  # pnMinNumberOfBytesNeeded : DWORD* out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "advapi32")]
extern "system" {
    fn ReadEventLogW(
        hEventLog: *mut core::ffi::c_void,  // HANDLE
        dwReadFlags: u32,  // READ_EVENT_LOG_READ_FLAGS
        dwRecordOffset: u32,  // DWORD
        lpBuffer: *mut (),  // void* out
        nNumberOfBytesToRead: u32,  // DWORD
        pnBytesRead: *mut u32,  // DWORD* out
        pnMinNumberOfBytesNeeded: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("ADVAPI32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool ReadEventLogW(IntPtr hEventLog, uint dwReadFlags, uint dwRecordOffset, IntPtr lpBuffer, uint nNumberOfBytesToRead, out uint pnBytesRead, out uint pnMinNumberOfBytesNeeded);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_ReadEventLogW' -Namespace Win32 -PassThru
# $api::ReadEventLogW(hEventLog, dwReadFlags, dwRecordOffset, lpBuffer, nNumberOfBytesToRead, pnBytesRead, pnMinNumberOfBytesNeeded)

#uselib "ADVAPI32.dll"
#func global ReadEventLogW "ReadEventLogW" wptr, wptr, wptr, wptr, wptr, wptr, wptr
; ReadEventLogW hEventLog, dwReadFlags, dwRecordOffset, lpBuffer, nNumberOfBytesToRead, varptr(pnBytesRead), varptr(pnMinNumberOfBytesNeeded)   ; 戻り値は stat
; hEventLog : HANDLE -> "wptr"
; dwReadFlags : READ_EVENT_LOG_READ_FLAGS -> "wptr"
; dwRecordOffset : DWORD -> "wptr"
; lpBuffer : void* out -> "wptr"
; nNumberOfBytesToRead : DWORD -> "wptr"
; pnBytesRead : DWORD* out -> "wptr"
; pnMinNumberOfBytesNeeded : DWORD* 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 "ADVAPI32.dll"
#cfunc global ReadEventLogW "ReadEventLogW" sptr, int, int, sptr, int, var, var
; res = ReadEventLogW(hEventLog, dwReadFlags, dwRecordOffset, lpBuffer, nNumberOfBytesToRead, pnBytesRead, pnMinNumberOfBytesNeeded)
; hEventLog : HANDLE -> "sptr"
; dwReadFlags : READ_EVENT_LOG_READ_FLAGS -> "int"
; dwRecordOffset : DWORD -> "int"
; lpBuffer : void* out -> "sptr"
; nNumberOfBytesToRead : DWORD -> "int"
; pnBytesRead : DWORD* out -> "var"
; pnMinNumberOfBytesNeeded : DWORD* 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。

; BOOL ReadEventLogW(HANDLE hEventLog, READ_EVENT_LOG_READ_FLAGS dwReadFlags, DWORD dwRecordOffset, void* lpBuffer, DWORD nNumberOfBytesToRead, DWORD* pnBytesRead, DWORD* pnMinNumberOfBytesNeeded)
#uselib "ADVAPI32.dll"
#cfunc global ReadEventLogW "ReadEventLogW" intptr, int, int, intptr, int, var, var
; res = ReadEventLogW(hEventLog, dwReadFlags, dwRecordOffset, lpBuffer, nNumberOfBytesToRead, pnBytesRead, pnMinNumberOfBytesNeeded)
; hEventLog : HANDLE -> "intptr"
; dwReadFlags : READ_EVENT_LOG_READ_FLAGS -> "int"
; dwRecordOffset : DWORD -> "int"
; lpBuffer : void* out -> "intptr"
; nNumberOfBytesToRead : DWORD -> "int"
; pnBytesRead : DWORD* out -> "var"
; pnMinNumberOfBytesNeeded : DWORD* 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 (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procReadEventLogW = advapi32.NewProc("ReadEventLogW")
)

// hEventLog (HANDLE), dwReadFlags (READ_EVENT_LOG_READ_FLAGS), dwRecordOffset (DWORD), lpBuffer (void* out), nNumberOfBytesToRead (DWORD), pnBytesRead (DWORD* out), pnMinNumberOfBytesNeeded (DWORD* out)
r1, _, err := procReadEventLogW.Call(
	uintptr(hEventLog),
	uintptr(dwReadFlags),
	uintptr(dwRecordOffset),
	uintptr(lpBuffer),
	uintptr(nNumberOfBytesToRead),
	uintptr(pnBytesRead),
	uintptr(pnMinNumberOfBytesNeeded),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function ReadEventLogW(
  hEventLog: THandle;   // HANDLE
  dwReadFlags: DWORD;   // READ_EVENT_LOG_READ_FLAGS
  dwRecordOffset: DWORD;   // DWORD
  lpBuffer: Pointer;   // void* out
  nNumberOfBytesToRead: DWORD;   // DWORD
  pnBytesRead: Pointer;   // DWORD* out
  pnMinNumberOfBytesNeeded: Pointer   // DWORD* out
): BOOL; stdcall;
  external 'ADVAPI32.dll' name 'ReadEventLogW';

result := DllCall("ADVAPI32\ReadEventLogW"
    , "Ptr", hEventLog   ; HANDLE
    , "UInt", dwReadFlags   ; READ_EVENT_LOG_READ_FLAGS
    , "UInt", dwRecordOffset   ; DWORD
    , "Ptr", lpBuffer   ; void* out
    , "UInt", nNumberOfBytesToRead   ; DWORD
    , "Ptr", pnBytesRead   ; DWORD* out
    , "Ptr", pnMinNumberOfBytesNeeded   ; DWORD* out
    , "Int")   ; return: BOOL

●ReadEventLogW(hEventLog, dwReadFlags, dwRecordOffset, lpBuffer, nNumberOfBytesToRead, pnBytesRead, pnMinNumberOfBytesNeeded) = DLL("ADVAPI32.dll", "bool ReadEventLogW(void*, dword, dword, void*, dword, void*, void*)")
# 呼び出し: ReadEventLogW(hEventLog, dwReadFlags, dwRecordOffset, lpBuffer, nNumberOfBytesToRead, pnBytesRead, pnMinNumberOfBytesNeeded)
# hEventLog : HANDLE -> "void*"
# dwReadFlags : READ_EVENT_LOG_READ_FLAGS -> "dword"
# dwRecordOffset : DWORD -> "dword"
# lpBuffer : void* out -> "void*"
# nNumberOfBytesToRead : DWORD -> "dword"
# pnBytesRead : DWORD* out -> "void*"
# pnMinNumberOfBytesNeeded : DWORD* 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。