EnumSystemLanguageGroupsW

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

BOOL EnumSystemLanguageGroupsW(
    LANGUAGEGROUP_ENUMPROCW lpLanguageGroupEnumProc,
    ENUM_SYSTEM_LANGUAGE_GROUPS_FLAGS dwFlags,
    INT_PTR lParam
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function EnumSystemLanguageGroupsW(
    lpLanguageGroupEnumProc As IntPtr,   ' LANGUAGEGROUP_ENUMPROCW
    dwFlags As UInteger,   ' ENUM_SYSTEM_LANGUAGE_GROUPS_FLAGS
    lParam As IntPtr   ' INT_PTR
) As Boolean
End Function

' lpLanguageGroupEnumProc : LANGUAGEGROUP_ENUMPROCW
' dwFlags : ENUM_SYSTEM_LANGUAGE_GROUPS_FLAGS
' lParam : INT_PTR
Declare PtrSafe Function EnumSystemLanguageGroupsW Lib "kernel32" ( _
    ByVal lpLanguageGroupEnumProc As LongPtr, _
    ByVal dwFlags As Long, _
    ByVal lParam 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

EnumSystemLanguageGroupsW = ctypes.windll.kernel32.EnumSystemLanguageGroupsW
EnumSystemLanguageGroupsW.restype = wintypes.BOOL
EnumSystemLanguageGroupsW.argtypes = [
    ctypes.c_void_p,  # lpLanguageGroupEnumProc : LANGUAGEGROUP_ENUMPROCW
    wintypes.DWORD,  # dwFlags : ENUM_SYSTEM_LANGUAGE_GROUPS_FLAGS
    ctypes.c_ssize_t,  # lParam : INT_PTR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
EnumSystemLanguageGroupsW = Fiddle::Function.new(
  lib['EnumSystemLanguageGroupsW'],
  [
    Fiddle::TYPE_VOIDP,  # lpLanguageGroupEnumProc : LANGUAGEGROUP_ENUMPROCW
    -Fiddle::TYPE_INT,  # dwFlags : ENUM_SYSTEM_LANGUAGE_GROUPS_FLAGS
    Fiddle::TYPE_INTPTR_T,  # lParam : INT_PTR
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "kernel32")]
extern "system" {
    fn EnumSystemLanguageGroupsW(
        lpLanguageGroupEnumProc: *const core::ffi::c_void,  // LANGUAGEGROUP_ENUMPROCW
        dwFlags: u32,  // ENUM_SYSTEM_LANGUAGE_GROUPS_FLAGS
        lParam: isize  // INT_PTR
    ) -> 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 EnumSystemLanguageGroupsW(IntPtr lpLanguageGroupEnumProc, uint dwFlags, IntPtr lParam);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_EnumSystemLanguageGroupsW' -Namespace Win32 -PassThru
# $api::EnumSystemLanguageGroupsW(lpLanguageGroupEnumProc, dwFlags, lParam)

#uselib "KERNEL32.dll"
#func global EnumSystemLanguageGroupsW "EnumSystemLanguageGroupsW" wptr, wptr, wptr
; EnumSystemLanguageGroupsW lpLanguageGroupEnumProc, dwFlags, lParam   ; 戻り値は stat
; lpLanguageGroupEnumProc : LANGUAGEGROUP_ENUMPROCW -> "wptr"
; dwFlags : ENUM_SYSTEM_LANGUAGE_GROUPS_FLAGS -> "wptr"
; lParam : INT_PTR -> "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 EnumSystemLanguageGroupsW "EnumSystemLanguageGroupsW" sptr, int, sptr
; res = EnumSystemLanguageGroupsW(lpLanguageGroupEnumProc, dwFlags, lParam)
; lpLanguageGroupEnumProc : LANGUAGEGROUP_ENUMPROCW -> "sptr"
; dwFlags : ENUM_SYSTEM_LANGUAGE_GROUPS_FLAGS -> "int"
; lParam : INT_PTR -> "sptr"

; BOOL EnumSystemLanguageGroupsW(LANGUAGEGROUP_ENUMPROCW lpLanguageGroupEnumProc, ENUM_SYSTEM_LANGUAGE_GROUPS_FLAGS dwFlags, INT_PTR lParam)
#uselib "KERNEL32.dll"
#cfunc global EnumSystemLanguageGroupsW "EnumSystemLanguageGroupsW" intptr, int, intptr
; res = EnumSystemLanguageGroupsW(lpLanguageGroupEnumProc, dwFlags, lParam)
; lpLanguageGroupEnumProc : LANGUAGEGROUP_ENUMPROCW -> "intptr"
; dwFlags : ENUM_SYSTEM_LANGUAGE_GROUPS_FLAGS -> "int"
; lParam : INT_PTR -> "intptr"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procEnumSystemLanguageGroupsW = kernel32.NewProc("EnumSystemLanguageGroupsW")
)

// lpLanguageGroupEnumProc (LANGUAGEGROUP_ENUMPROCW), dwFlags (ENUM_SYSTEM_LANGUAGE_GROUPS_FLAGS), lParam (INT_PTR)
r1, _, err := procEnumSystemLanguageGroupsW.Call(
	uintptr(lpLanguageGroupEnumProc),
	uintptr(dwFlags),
	uintptr(lParam),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function EnumSystemLanguageGroupsW(
  lpLanguageGroupEnumProc: Pointer;   // LANGUAGEGROUP_ENUMPROCW
  dwFlags: DWORD;   // ENUM_SYSTEM_LANGUAGE_GROUPS_FLAGS
  lParam: NativeInt   // INT_PTR
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'EnumSystemLanguageGroupsW';

result := DllCall("KERNEL32\EnumSystemLanguageGroupsW"
    , "Ptr", lpLanguageGroupEnumProc   ; LANGUAGEGROUP_ENUMPROCW
    , "UInt", dwFlags   ; ENUM_SYSTEM_LANGUAGE_GROUPS_FLAGS
    , "Ptr", lParam   ; INT_PTR
    , "Int")   ; return: BOOL

●EnumSystemLanguageGroupsW(lpLanguageGroupEnumProc, dwFlags, lParam) = DLL("KERNEL32.dll", "bool EnumSystemLanguageGroupsW(void*, dword, int)")
# 呼び出し: EnumSystemLanguageGroupsW(lpLanguageGroupEnumProc, dwFlags, lParam)
# lpLanguageGroupEnumProc : LANGUAGEGROUP_ENUMPROCW -> "void*"
# dwFlags : ENUM_SYSTEM_LANGUAGE_GROUPS_FLAGS -> "dword"
# lParam : INT_PTR -> "int"
# 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。