EnumSystemLocalesW

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

BOOL EnumSystemLocalesW(
    LOCALE_ENUMPROCW lpLocaleEnumProc,
    DWORD dwFlags
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function EnumSystemLocalesW(
    lpLocaleEnumProc As IntPtr,   ' LOCALE_ENUMPROCW
    dwFlags As UInteger   ' DWORD
) As Boolean
End Function

' lpLocaleEnumProc : LOCALE_ENUMPROCW
' dwFlags : DWORD
Declare PtrSafe Function EnumSystemLocalesW Lib "kernel32" ( _
    ByVal lpLocaleEnumProc As LongPtr, _
    ByVal dwFlags 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

EnumSystemLocalesW = ctypes.windll.kernel32.EnumSystemLocalesW
EnumSystemLocalesW.restype = wintypes.BOOL
EnumSystemLocalesW.argtypes = [
    ctypes.c_void_p,  # lpLocaleEnumProc : LOCALE_ENUMPROCW
    wintypes.DWORD,  # dwFlags : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
EnumSystemLocalesW = Fiddle::Function.new(
  lib['EnumSystemLocalesW'],
  [
    Fiddle::TYPE_VOIDP,  # lpLocaleEnumProc : LOCALE_ENUMPROCW
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "kernel32")]
extern "system" {
    fn EnumSystemLocalesW(
        lpLocaleEnumProc: *const core::ffi::c_void,  // LOCALE_ENUMPROCW
        dwFlags: u32  // DWORD
    ) -> 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 EnumSystemLocalesW(IntPtr lpLocaleEnumProc, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_EnumSystemLocalesW' -Namespace Win32 -PassThru
# $api::EnumSystemLocalesW(lpLocaleEnumProc, dwFlags)

#uselib "KERNEL32.dll"
#func global EnumSystemLocalesW "EnumSystemLocalesW" wptr, wptr
; EnumSystemLocalesW lpLocaleEnumProc, dwFlags   ; 戻り値は stat
; lpLocaleEnumProc : LOCALE_ENUMPROCW -> "wptr"
; dwFlags : 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 "KERNEL32.dll"
#cfunc global EnumSystemLocalesW "EnumSystemLocalesW" sptr, int
; res = EnumSystemLocalesW(lpLocaleEnumProc, dwFlags)
; lpLocaleEnumProc : LOCALE_ENUMPROCW -> "sptr"
; dwFlags : DWORD -> "int"

; BOOL EnumSystemLocalesW(LOCALE_ENUMPROCW lpLocaleEnumProc, DWORD dwFlags)
#uselib "KERNEL32.dll"
#cfunc global EnumSystemLocalesW "EnumSystemLocalesW" intptr, int
; res = EnumSystemLocalesW(lpLocaleEnumProc, dwFlags)
; lpLocaleEnumProc : LOCALE_ENUMPROCW -> "intptr"
; dwFlags : DWORD -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procEnumSystemLocalesW = kernel32.NewProc("EnumSystemLocalesW")
)

// lpLocaleEnumProc (LOCALE_ENUMPROCW), dwFlags (DWORD)
r1, _, err := procEnumSystemLocalesW.Call(
	uintptr(lpLocaleEnumProc),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function EnumSystemLocalesW(
  lpLocaleEnumProc: Pointer;   // LOCALE_ENUMPROCW
  dwFlags: DWORD   // DWORD
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'EnumSystemLocalesW';

result := DllCall("KERNEL32\EnumSystemLocalesW"
    , "Ptr", lpLocaleEnumProc   ; LOCALE_ENUMPROCW
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: BOOL

●EnumSystemLocalesW(lpLocaleEnumProc, dwFlags) = DLL("KERNEL32.dll", "bool EnumSystemLocalesW(void*, dword)")
# 呼び出し: EnumSystemLocalesW(lpLocaleEnumProc, dwFlags)
# lpLocaleEnumProc : LOCALE_ENUMPROCW -> "void*"
# dwFlags : 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。