MsiEnableLogW

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

DWORD MsiEnableLogW(
    DWORD dwLogMode,
    LPCWSTR szLogFile,   // optional
    DWORD dwLogAttributes
);

<DllImport("msi.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function MsiEnableLogW(
    dwLogMode As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> szLogFile As String,   ' LPCWSTR optional
    dwLogAttributes As UInteger   ' DWORD
) As UInteger
End Function

' dwLogMode : DWORD
' szLogFile : LPCWSTR optional
' dwLogAttributes : DWORD
Declare PtrSafe Function MsiEnableLogW Lib "msi" ( _
    ByVal dwLogMode As Long, _
    ByVal szLogFile As LongPtr, _
    ByVal dwLogAttributes 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

MsiEnableLogW = ctypes.windll.msi.MsiEnableLogW
MsiEnableLogW.restype = wintypes.DWORD
MsiEnableLogW.argtypes = [
    wintypes.DWORD,  # dwLogMode : DWORD
    wintypes.LPCWSTR,  # szLogFile : LPCWSTR optional
    wintypes.DWORD,  # dwLogAttributes : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('msi.dll')
MsiEnableLogW = Fiddle::Function.new(
  lib['MsiEnableLogW'],
  [
    -Fiddle::TYPE_INT,  # dwLogMode : DWORD
    Fiddle::TYPE_VOIDP,  # szLogFile : LPCWSTR optional
    -Fiddle::TYPE_INT,  # dwLogAttributes : DWORD
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "msi")]
extern "system" {
    fn MsiEnableLogW(
        dwLogMode: u32,  // DWORD
        szLogFile: *const u16,  // LPCWSTR optional
        dwLogAttributes: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("msi.dll", CharSet = CharSet.Unicode)]
public static extern uint MsiEnableLogW(uint dwLogMode, [MarshalAs(UnmanagedType.LPWStr)] string szLogFile, uint dwLogAttributes);
"@
$api = Add-Type -MemberDefinition $sig -Name 'msi_MsiEnableLogW' -Namespace Win32 -PassThru
# $api::MsiEnableLogW(dwLogMode, szLogFile, dwLogAttributes)

#uselib "msi.dll"
#func global MsiEnableLogW "MsiEnableLogW" wptr, wptr, wptr
; MsiEnableLogW dwLogMode, szLogFile, dwLogAttributes   ; 戻り値は stat
; dwLogMode : DWORD -> "wptr"
; szLogFile : LPCWSTR optional -> "wptr"
; dwLogAttributes : DWORD -> "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 "msi.dll"
#cfunc global MsiEnableLogW "MsiEnableLogW" int, wstr, int
; res = MsiEnableLogW(dwLogMode, szLogFile, dwLogAttributes)
; dwLogMode : DWORD -> "int"
; szLogFile : LPCWSTR optional -> "wstr"
; dwLogAttributes : DWORD -> "int"

; DWORD MsiEnableLogW(DWORD dwLogMode, LPCWSTR szLogFile, DWORD dwLogAttributes)
#uselib "msi.dll"
#cfunc global MsiEnableLogW "MsiEnableLogW" int, wstr, int
; res = MsiEnableLogW(dwLogMode, szLogFile, dwLogAttributes)
; dwLogMode : DWORD -> "int"
; szLogFile : LPCWSTR optional -> "wstr"
; dwLogAttributes : DWORD -> "int"

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

var (
	msi = windows.NewLazySystemDLL("msi.dll")
	procMsiEnableLogW = msi.NewProc("MsiEnableLogW")
)

// dwLogMode (DWORD), szLogFile (LPCWSTR optional), dwLogAttributes (DWORD)
r1, _, err := procMsiEnableLogW.Call(
	uintptr(dwLogMode),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szLogFile))),
	uintptr(dwLogAttributes),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function MsiEnableLogW(
  dwLogMode: DWORD;   // DWORD
  szLogFile: PWideChar;   // LPCWSTR optional
  dwLogAttributes: DWORD   // DWORD
): DWORD; stdcall;
  external 'msi.dll' name 'MsiEnableLogW';

result := DllCall("msi\MsiEnableLogW"
    , "UInt", dwLogMode   ; DWORD
    , "WStr", szLogFile   ; LPCWSTR optional
    , "UInt", dwLogAttributes   ; DWORD
    , "UInt")   ; return: DWORD

●MsiEnableLogW(dwLogMode, szLogFile, dwLogAttributes) = DLL("msi.dll", "dword MsiEnableLogW(dword, char*, dword)")
# 呼び出し: MsiEnableLogW(dwLogMode, szLogFile, dwLogAttributes)
# dwLogMode : DWORD -> "dword"
# szLogFile : LPCWSTR optional -> "char*"
# dwLogAttributes : 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。