RegisterEventSourceW

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

HANDLE RegisterEventSourceW(
    LPCWSTR lpUNCServerName,   // optional
    LPCWSTR lpSourceName
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function RegisterEventSourceW(
    <MarshalAs(UnmanagedType.LPWStr)> lpUNCServerName As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> lpSourceName As String   ' LPCWSTR
) As IntPtr
End Function

' lpUNCServerName : LPCWSTR optional
' lpSourceName : LPCWSTR
Declare PtrSafe Function RegisterEventSourceW Lib "advapi32" ( _
    ByVal lpUNCServerName As LongPtr, _
    ByVal lpSourceName As LongPtr) As LongPtr
' 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

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

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
RegisterEventSourceW = Fiddle::Function.new(
  lib['RegisterEventSourceW'],
  [
    Fiddle::TYPE_VOIDP,  # lpUNCServerName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # lpSourceName : LPCWSTR
  ],
  Fiddle::TYPE_VOIDP)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "advapi32")]
extern "system" {
    fn RegisterEventSourceW(
        lpUNCServerName: *const u16,  // LPCWSTR optional
        lpSourceName: *const u16  // LPCWSTR
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ADVAPI32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern IntPtr RegisterEventSourceW([MarshalAs(UnmanagedType.LPWStr)] string lpUNCServerName, [MarshalAs(UnmanagedType.LPWStr)] string lpSourceName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_RegisterEventSourceW' -Namespace Win32 -PassThru
# $api::RegisterEventSourceW(lpUNCServerName, lpSourceName)

#uselib "ADVAPI32.dll"
#func global RegisterEventSourceW "RegisterEventSourceW" wptr, wptr
; RegisterEventSourceW lpUNCServerName, lpSourceName   ; 戻り値は stat
; lpUNCServerName : LPCWSTR optional -> "wptr"
; lpSourceName : LPCWSTR -> "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 RegisterEventSourceW "RegisterEventSourceW" wstr, wstr
; res = RegisterEventSourceW(lpUNCServerName, lpSourceName)
; lpUNCServerName : LPCWSTR optional -> "wstr"
; lpSourceName : LPCWSTR -> "wstr"

; HANDLE RegisterEventSourceW(LPCWSTR lpUNCServerName, LPCWSTR lpSourceName)
#uselib "ADVAPI32.dll"
#cfunc global RegisterEventSourceW "RegisterEventSourceW" wstr, wstr
; res = RegisterEventSourceW(lpUNCServerName, lpSourceName)
; lpUNCServerName : LPCWSTR optional -> "wstr"
; lpSourceName : LPCWSTR -> "wstr"

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

var (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procRegisterEventSourceW = advapi32.NewProc("RegisterEventSourceW")
)

// lpUNCServerName (LPCWSTR optional), lpSourceName (LPCWSTR)
r1, _, err := procRegisterEventSourceW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpUNCServerName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpSourceName))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HANDLE

function RegisterEventSourceW(
  lpUNCServerName: PWideChar;   // LPCWSTR optional
  lpSourceName: PWideChar   // LPCWSTR
): THandle; stdcall;
  external 'ADVAPI32.dll' name 'RegisterEventSourceW';

result := DllCall("ADVAPI32\RegisterEventSourceW"
    , "WStr", lpUNCServerName   ; LPCWSTR optional
    , "WStr", lpSourceName   ; LPCWSTR
    , "Ptr")   ; return: HANDLE

●RegisterEventSourceW(lpUNCServerName, lpSourceName) = DLL("ADVAPI32.dll", "void* RegisterEventSourceW(char*, char*)")
# 呼び出し: RegisterEventSourceW(lpUNCServerName, lpSourceName)
# lpUNCServerName : LPCWSTR optional -> "char*"
# lpSourceName : LPCWSTR -> "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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。