OpenEventLogA

// ADVAPI32.dll  (ANSI / -A)
#include <windows.h>

HANDLE OpenEventLogA(
    LPCSTR lpUNCServerName,   // optional
    LPCSTR lpSourceName
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function OpenEventLogA(
    <MarshalAs(UnmanagedType.LPStr)> lpUNCServerName As String,   ' LPCSTR optional
    <MarshalAs(UnmanagedType.LPStr)> lpSourceName As String   ' LPCSTR
) As IntPtr
End Function

' lpUNCServerName : LPCSTR optional
' lpSourceName : LPCSTR
Declare PtrSafe Function OpenEventLogA Lib "advapi32" ( _
    ByVal lpUNCServerName As String, _
    ByVal lpSourceName As String) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

OpenEventLogA = ctypes.windll.advapi32.OpenEventLogA
OpenEventLogA.restype = ctypes.c_void_p
OpenEventLogA.argtypes = [
    wintypes.LPCSTR,  # lpUNCServerName : LPCSTR optional
    wintypes.LPCSTR,  # lpSourceName : LPCSTR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
OpenEventLogA = Fiddle::Function.new(
  lib['OpenEventLogA'],
  [
    Fiddle::TYPE_VOIDP,  # lpUNCServerName : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # lpSourceName : LPCSTR
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "advapi32")]
extern "system" {
    fn OpenEventLogA(
        lpUNCServerName: *const u8,  // LPCSTR optional
        lpSourceName: *const u8  // LPCSTR
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ADVAPI32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern IntPtr OpenEventLogA([MarshalAs(UnmanagedType.LPStr)] string lpUNCServerName, [MarshalAs(UnmanagedType.LPStr)] string lpSourceName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_OpenEventLogA' -Namespace Win32 -PassThru
# $api::OpenEventLogA(lpUNCServerName, lpSourceName)

#uselib "ADVAPI32.dll"
#func global OpenEventLogA "OpenEventLogA" sptr, sptr
; OpenEventLogA lpUNCServerName, lpSourceName   ; 戻り値は stat
; lpUNCServerName : LPCSTR optional -> "sptr"
; lpSourceName : LPCSTR -> "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 "ADVAPI32.dll"
#cfunc global OpenEventLogA "OpenEventLogA" str, str
; res = OpenEventLogA(lpUNCServerName, lpSourceName)
; lpUNCServerName : LPCSTR optional -> "str"
; lpSourceName : LPCSTR -> "str"

; HANDLE OpenEventLogA(LPCSTR lpUNCServerName, LPCSTR lpSourceName)
#uselib "ADVAPI32.dll"
#cfunc global OpenEventLogA "OpenEventLogA" str, str
; res = OpenEventLogA(lpUNCServerName, lpSourceName)
; lpUNCServerName : LPCSTR optional -> "str"
; lpSourceName : LPCSTR -> "str"

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

var (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procOpenEventLogA = advapi32.NewProc("OpenEventLogA")
)

// lpUNCServerName (LPCSTR optional), lpSourceName (LPCSTR)
r1, _, err := procOpenEventLogA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpUNCServerName))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpSourceName))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HANDLE

function OpenEventLogA(
  lpUNCServerName: PAnsiChar;   // LPCSTR optional
  lpSourceName: PAnsiChar   // LPCSTR
): THandle; stdcall;
  external 'ADVAPI32.dll' name 'OpenEventLogA';

result := DllCall("ADVAPI32\OpenEventLogA"
    , "AStr", lpUNCServerName   ; LPCSTR optional
    , "AStr", lpSourceName   ; LPCSTR
    , "Ptr")   ; return: HANDLE

●OpenEventLogA(lpUNCServerName, lpSourceName) = DLL("ADVAPI32.dll", "void* OpenEventLogA(char*, char*)")
# 呼び出し: OpenEventLogA(lpUNCServerName, lpSourceName)
# lpUNCServerName : LPCSTR optional -> "char*"
# lpSourceName : LPCSTR -> "char*"
# 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)。