GetPrivateProfileSectionNamesW

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

DWORD GetPrivateProfileSectionNamesW(
    LPWSTR lpszReturnBuffer,   // optional
    DWORD nSize,
    LPCWSTR lpFileName   // optional
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function GetPrivateProfileSectionNamesW(
    <MarshalAs(UnmanagedType.LPWStr)> lpszReturnBuffer As System.Text.StringBuilder,   ' LPWSTR optional, out
    nSize As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> lpFileName As String   ' LPCWSTR optional
) As UInteger
End Function

' lpszReturnBuffer : LPWSTR optional, out
' nSize : DWORD
' lpFileName : LPCWSTR optional
Declare PtrSafe Function GetPrivateProfileSectionNamesW Lib "kernel32" ( _
    ByVal lpszReturnBuffer As LongPtr, _
    ByVal nSize As Long, _
    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

GetPrivateProfileSectionNamesW = ctypes.windll.kernel32.GetPrivateProfileSectionNamesW
GetPrivateProfileSectionNamesW.restype = wintypes.DWORD
GetPrivateProfileSectionNamesW.argtypes = [
    wintypes.LPWSTR,  # lpszReturnBuffer : LPWSTR optional, out
    wintypes.DWORD,  # nSize : DWORD
    wintypes.LPCWSTR,  # lpFileName : LPCWSTR optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetPrivateProfileSectionNamesW = Fiddle::Function.new(
  lib['GetPrivateProfileSectionNamesW'],
  [
    Fiddle::TYPE_VOIDP,  # lpszReturnBuffer : LPWSTR optional, out
    -Fiddle::TYPE_INT,  # nSize : DWORD
    Fiddle::TYPE_VOIDP,  # lpFileName : LPCWSTR optional
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "kernel32")]
extern "system" {
    fn GetPrivateProfileSectionNamesW(
        lpszReturnBuffer: *mut u16,  // LPWSTR optional, out
        nSize: u32,  // DWORD
        lpFileName: *const u16  // LPCWSTR optional
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", CharSet = CharSet.Unicode)]
public static extern uint GetPrivateProfileSectionNamesW([MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpszReturnBuffer, uint nSize, [MarshalAs(UnmanagedType.LPWStr)] string lpFileName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetPrivateProfileSectionNamesW' -Namespace Win32 -PassThru
# $api::GetPrivateProfileSectionNamesW(lpszReturnBuffer, nSize, lpFileName)

#uselib "KERNEL32.dll"
#func global GetPrivateProfileSectionNamesW "GetPrivateProfileSectionNamesW" wptr, wptr, wptr
; GetPrivateProfileSectionNamesW varptr(lpszReturnBuffer), nSize, lpFileName   ; 戻り値は stat
; lpszReturnBuffer : LPWSTR optional, out -> "wptr"
; nSize : DWORD -> "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 GetPrivateProfileSectionNamesW "GetPrivateProfileSectionNamesW" var, int, wstr
; res = GetPrivateProfileSectionNamesW(lpszReturnBuffer, nSize, lpFileName)
; lpszReturnBuffer : LPWSTR optional, out -> "var"
; nSize : DWORD -> "int"
; lpFileName : LPCWSTR optional -> "wstr"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; DWORD GetPrivateProfileSectionNamesW(LPWSTR lpszReturnBuffer, DWORD nSize, LPCWSTR lpFileName)
#uselib "KERNEL32.dll"
#cfunc global GetPrivateProfileSectionNamesW "GetPrivateProfileSectionNamesW" var, int, wstr
; res = GetPrivateProfileSectionNamesW(lpszReturnBuffer, nSize, lpFileName)
; lpszReturnBuffer : LPWSTR optional, out -> "var"
; nSize : DWORD -> "int"
; lpFileName : LPCWSTR optional -> "wstr"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procGetPrivateProfileSectionNamesW = kernel32.NewProc("GetPrivateProfileSectionNamesW")
)

// lpszReturnBuffer (LPWSTR optional, out), nSize (DWORD), lpFileName (LPCWSTR optional)
r1, _, err := procGetPrivateProfileSectionNamesW.Call(
	uintptr(lpszReturnBuffer),
	uintptr(nSize),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpFileName))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function GetPrivateProfileSectionNamesW(
  lpszReturnBuffer: PWideChar;   // LPWSTR optional, out
  nSize: DWORD;   // DWORD
  lpFileName: PWideChar   // LPCWSTR optional
): DWORD; stdcall;
  external 'KERNEL32.dll' name 'GetPrivateProfileSectionNamesW';

result := DllCall("KERNEL32\GetPrivateProfileSectionNamesW"
    , "Ptr", lpszReturnBuffer   ; LPWSTR optional, out
    , "UInt", nSize   ; DWORD
    , "WStr", lpFileName   ; LPCWSTR optional
    , "UInt")   ; return: DWORD

●GetPrivateProfileSectionNamesW(lpszReturnBuffer, nSize, lpFileName) = DLL("KERNEL32.dll", "dword GetPrivateProfileSectionNamesW(char*, dword, char*)")
# 呼び出し: GetPrivateProfileSectionNamesW(lpszReturnBuffer, nSize, lpFileName)
# lpszReturnBuffer : LPWSTR optional, out -> "char*"
# nSize : DWORD -> "dword"
# 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。