EvtOpenLog

// wevtapi.dll
#include <windows.h>

EVT_HANDLE EvtOpenLog(
    EVT_HANDLE Session,   // optional
    LPCWSTR Path,
    DWORD Flags
);

<DllImport("wevtapi.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function EvtOpenLog(
    Session As IntPtr,   ' EVT_HANDLE optional
    <MarshalAs(UnmanagedType.LPWStr)> Path As String,   ' LPCWSTR
    Flags As UInteger   ' DWORD
) As IntPtr
End Function

' Session : EVT_HANDLE optional
' Path : LPCWSTR
' Flags : DWORD
Declare PtrSafe Function EvtOpenLog Lib "wevtapi" ( _
    ByVal Session As LongPtr, _
    ByVal Path As LongPtr, _
    ByVal Flags As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

EvtOpenLog = ctypes.windll.wevtapi.EvtOpenLog
EvtOpenLog.restype = ctypes.c_ssize_t
EvtOpenLog.argtypes = [
    ctypes.c_ssize_t,  # Session : EVT_HANDLE optional
    wintypes.LPCWSTR,  # Path : LPCWSTR
    wintypes.DWORD,  # Flags : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('wevtapi.dll')
EvtOpenLog = Fiddle::Function.new(
  lib['EvtOpenLog'],
  [
    Fiddle::TYPE_INTPTR_T,  # Session : EVT_HANDLE optional
    Fiddle::TYPE_VOIDP,  # Path : LPCWSTR
    -Fiddle::TYPE_INT,  # Flags : DWORD
  ],
  Fiddle::TYPE_INTPTR_T)

#[link(name = "wevtapi")]
extern "system" {
    fn EvtOpenLog(
        Session: isize,  // EVT_HANDLE optional
        Path: *const u16,  // LPCWSTR
        Flags: u32  // DWORD
    ) -> isize;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("wevtapi.dll", SetLastError = true)]
public static extern IntPtr EvtOpenLog(IntPtr Session, [MarshalAs(UnmanagedType.LPWStr)] string Path, uint Flags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'wevtapi_EvtOpenLog' -Namespace Win32 -PassThru
# $api::EvtOpenLog(Session, Path, Flags)

#uselib "wevtapi.dll"
#func global EvtOpenLog "EvtOpenLog" sptr, sptr, sptr
; EvtOpenLog Session, Path, Flags   ; 戻り値は stat
; Session : EVT_HANDLE optional -> "sptr"
; Path : LPCWSTR -> "sptr"
; Flags : DWORD -> "sptr"
; ※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 "wevtapi.dll"
#cfunc global EvtOpenLog "EvtOpenLog" sptr, wstr, int
; res = EvtOpenLog(Session, Path, Flags)
; Session : EVT_HANDLE optional -> "sptr"
; Path : LPCWSTR -> "wstr"
; Flags : DWORD -> "int"

; EVT_HANDLE EvtOpenLog(EVT_HANDLE Session, LPCWSTR Path, DWORD Flags)
#uselib "wevtapi.dll"
#cfunc global EvtOpenLog "EvtOpenLog" intptr, wstr, int
; res = EvtOpenLog(Session, Path, Flags)
; Session : EVT_HANDLE optional -> "intptr"
; Path : LPCWSTR -> "wstr"
; Flags : DWORD -> "int"

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

var (
	wevtapi = windows.NewLazySystemDLL("wevtapi.dll")
	procEvtOpenLog = wevtapi.NewProc("EvtOpenLog")
)

// Session (EVT_HANDLE optional), Path (LPCWSTR), Flags (DWORD)
r1, _, err := procEvtOpenLog.Call(
	uintptr(Session),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(Path))),
	uintptr(Flags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // EVT_HANDLE

function EvtOpenLog(
  Session: NativeInt;   // EVT_HANDLE optional
  Path: PWideChar;   // LPCWSTR
  Flags: DWORD   // DWORD
): NativeInt; stdcall;
  external 'wevtapi.dll' name 'EvtOpenLog';

result := DllCall("wevtapi\EvtOpenLog"
    , "Ptr", Session   ; EVT_HANDLE optional
    , "WStr", Path   ; LPCWSTR
    , "UInt", Flags   ; DWORD
    , "Ptr")   ; return: EVT_HANDLE

●EvtOpenLog(Session, Path, Flags) = DLL("wevtapi.dll", "int EvtOpenLog(int, char*, dword)")
# 呼び出し: EvtOpenLog(Session, Path, Flags)
# Session : EVT_HANDLE optional -> "int"
# Path : LPCWSTR -> "char*"
# Flags : DWORD -> "dword"
# 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)。