WritePrivateProfileStringW

// KERNEL32.dll  (Unicode / -W)
#include <windows.h>

BOOL WritePrivateProfileStringW(
    LPCWSTR lpAppName,   // optional
    LPCWSTR lpKeyName,   // optional
    LPCWSTR lpString,   // optional
    LPCWSTR lpFileName   // optional
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WritePrivateProfileStringW(
    <MarshalAs(UnmanagedType.LPWStr)> lpAppName As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> lpKeyName As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> lpString As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> lpFileName As String   ' LPCWSTR optional
) As Boolean
End Function

' lpAppName : LPCWSTR optional
' lpKeyName : LPCWSTR optional
' lpString : LPCWSTR optional
' lpFileName : LPCWSTR optional
Declare PtrSafe Function WritePrivateProfileStringW Lib "kernel32" ( _
    ByVal lpAppName As LongPtr, _
    ByVal lpKeyName As LongPtr, _
    ByVal lpString As LongPtr, _
    ByVal lpFileName As LongPtr) 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

WritePrivateProfileStringW = ctypes.windll.kernel32.WritePrivateProfileStringW
WritePrivateProfileStringW.restype = wintypes.BOOL
WritePrivateProfileStringW.argtypes = [
    wintypes.LPCWSTR,  # lpAppName : LPCWSTR optional
    wintypes.LPCWSTR,  # lpKeyName : LPCWSTR optional
    wintypes.LPCWSTR,  # lpString : LPCWSTR optional
    wintypes.LPCWSTR,  # lpFileName : LPCWSTR optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
WritePrivateProfileStringW = Fiddle::Function.new(
  lib['WritePrivateProfileStringW'],
  [
    Fiddle::TYPE_VOIDP,  # lpAppName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # lpKeyName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # lpString : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # lpFileName : LPCWSTR optional
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "kernel32")]
extern "system" {
    fn WritePrivateProfileStringW(
        lpAppName: *const u16,  // LPCWSTR optional
        lpKeyName: *const u16,  // LPCWSTR optional
        lpString: *const u16,  // LPCWSTR optional
        lpFileName: *const u16  // LPCWSTR optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool WritePrivateProfileStringW([MarshalAs(UnmanagedType.LPWStr)] string lpAppName, [MarshalAs(UnmanagedType.LPWStr)] string lpKeyName, [MarshalAs(UnmanagedType.LPWStr)] string lpString, [MarshalAs(UnmanagedType.LPWStr)] string lpFileName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_WritePrivateProfileStringW' -Namespace Win32 -PassThru
# $api::WritePrivateProfileStringW(lpAppName, lpKeyName, lpString, lpFileName)

#uselib "KERNEL32.dll"
#func global WritePrivateProfileStringW "WritePrivateProfileStringW" wptr, wptr, wptr, wptr
; WritePrivateProfileStringW lpAppName, lpKeyName, lpString, lpFileName   ; 戻り値は stat
; lpAppName : LPCWSTR optional -> "wptr"
; lpKeyName : LPCWSTR optional -> "wptr"
; lpString : LPCWSTR optional -> "wptr"
; lpFileName : LPCWSTR optional -> "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 "KERNEL32.dll"
#cfunc global WritePrivateProfileStringW "WritePrivateProfileStringW" wstr, wstr, wstr, wstr
; res = WritePrivateProfileStringW(lpAppName, lpKeyName, lpString, lpFileName)
; lpAppName : LPCWSTR optional -> "wstr"
; lpKeyName : LPCWSTR optional -> "wstr"
; lpString : LPCWSTR optional -> "wstr"
; lpFileName : LPCWSTR optional -> "wstr"

; BOOL WritePrivateProfileStringW(LPCWSTR lpAppName, LPCWSTR lpKeyName, LPCWSTR lpString, LPCWSTR lpFileName)
#uselib "KERNEL32.dll"
#cfunc global WritePrivateProfileStringW "WritePrivateProfileStringW" wstr, wstr, wstr, wstr
; res = WritePrivateProfileStringW(lpAppName, lpKeyName, lpString, lpFileName)
; lpAppName : LPCWSTR optional -> "wstr"
; lpKeyName : LPCWSTR optional -> "wstr"
; lpString : LPCWSTR optional -> "wstr"
; lpFileName : LPCWSTR optional -> "wstr"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procWritePrivateProfileStringW = kernel32.NewProc("WritePrivateProfileStringW")
)

// lpAppName (LPCWSTR optional), lpKeyName (LPCWSTR optional), lpString (LPCWSTR optional), lpFileName (LPCWSTR optional)
r1, _, err := procWritePrivateProfileStringW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpAppName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpKeyName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpString))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpFileName))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function WritePrivateProfileStringW(
  lpAppName: PWideChar;   // LPCWSTR optional
  lpKeyName: PWideChar;   // LPCWSTR optional
  lpString: PWideChar;   // LPCWSTR optional
  lpFileName: PWideChar   // LPCWSTR optional
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'WritePrivateProfileStringW';

result := DllCall("KERNEL32\WritePrivateProfileStringW"
    , "WStr", lpAppName   ; LPCWSTR optional
    , "WStr", lpKeyName   ; LPCWSTR optional
    , "WStr", lpString   ; LPCWSTR optional
    , "WStr", lpFileName   ; LPCWSTR optional
    , "Int")   ; return: BOOL

●WritePrivateProfileStringW(lpAppName, lpKeyName, lpString, lpFileName) = DLL("KERNEL32.dll", "bool WritePrivateProfileStringW(char*, char*, char*, char*)")
# 呼び出し: WritePrivateProfileStringW(lpAppName, lpKeyName, lpString, lpFileName)
# lpAppName : LPCWSTR optional -> "char*"
# lpKeyName : LPCWSTR optional -> "char*"
# lpString : LPCWSTR optional -> "char*"
# lpFileName : LPCWSTR optional -> "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。