EnumCalendarInfoExW

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

BOOL EnumCalendarInfoExW(
    CALINFO_ENUMPROCEXW lpCalInfoEnumProcEx,
    DWORD Locale,
    DWORD Calendar,
    DWORD CalType
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function EnumCalendarInfoExW(
    lpCalInfoEnumProcEx As IntPtr,   ' CALINFO_ENUMPROCEXW
    Locale As UInteger,   ' DWORD
    Calendar As UInteger,   ' DWORD
    CalType As UInteger   ' DWORD
) As Boolean
End Function

' lpCalInfoEnumProcEx : CALINFO_ENUMPROCEXW
' Locale : DWORD
' Calendar : DWORD
' CalType : DWORD
Declare PtrSafe Function EnumCalendarInfoExW Lib "kernel32" ( _
    ByVal lpCalInfoEnumProcEx As LongPtr, _
    ByVal Locale As Long, _
    ByVal Calendar As Long, _
    ByVal CalType 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

EnumCalendarInfoExW = ctypes.windll.kernel32.EnumCalendarInfoExW
EnumCalendarInfoExW.restype = wintypes.BOOL
EnumCalendarInfoExW.argtypes = [
    ctypes.c_void_p,  # lpCalInfoEnumProcEx : CALINFO_ENUMPROCEXW
    wintypes.DWORD,  # Locale : DWORD
    wintypes.DWORD,  # Calendar : DWORD
    wintypes.DWORD,  # CalType : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
EnumCalendarInfoExW = Fiddle::Function.new(
  lib['EnumCalendarInfoExW'],
  [
    Fiddle::TYPE_VOIDP,  # lpCalInfoEnumProcEx : CALINFO_ENUMPROCEXW
    -Fiddle::TYPE_INT,  # Locale : DWORD
    -Fiddle::TYPE_INT,  # Calendar : DWORD
    -Fiddle::TYPE_INT,  # CalType : DWORD
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "kernel32")]
extern "system" {
    fn EnumCalendarInfoExW(
        lpCalInfoEnumProcEx: *const core::ffi::c_void,  // CALINFO_ENUMPROCEXW
        Locale: u32,  // DWORD
        Calendar: u32,  // DWORD
        CalType: 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 EnumCalendarInfoExW(IntPtr lpCalInfoEnumProcEx, uint Locale, uint Calendar, uint CalType);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_EnumCalendarInfoExW' -Namespace Win32 -PassThru
# $api::EnumCalendarInfoExW(lpCalInfoEnumProcEx, Locale, Calendar, CalType)

#uselib "KERNEL32.dll"
#func global EnumCalendarInfoExW "EnumCalendarInfoExW" wptr, wptr, wptr, wptr
; EnumCalendarInfoExW lpCalInfoEnumProcEx, Locale, Calendar, CalType   ; 戻り値は stat
; lpCalInfoEnumProcEx : CALINFO_ENUMPROCEXW -> "wptr"
; Locale : DWORD -> "wptr"
; Calendar : DWORD -> "wptr"
; CalType : 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 EnumCalendarInfoExW "EnumCalendarInfoExW" sptr, int, int, int
; res = EnumCalendarInfoExW(lpCalInfoEnumProcEx, Locale, Calendar, CalType)
; lpCalInfoEnumProcEx : CALINFO_ENUMPROCEXW -> "sptr"
; Locale : DWORD -> "int"
; Calendar : DWORD -> "int"
; CalType : DWORD -> "int"

; BOOL EnumCalendarInfoExW(CALINFO_ENUMPROCEXW lpCalInfoEnumProcEx, DWORD Locale, DWORD Calendar, DWORD CalType)
#uselib "KERNEL32.dll"
#cfunc global EnumCalendarInfoExW "EnumCalendarInfoExW" intptr, int, int, int
; res = EnumCalendarInfoExW(lpCalInfoEnumProcEx, Locale, Calendar, CalType)
; lpCalInfoEnumProcEx : CALINFO_ENUMPROCEXW -> "intptr"
; Locale : DWORD -> "int"
; Calendar : DWORD -> "int"
; CalType : DWORD -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procEnumCalendarInfoExW = kernel32.NewProc("EnumCalendarInfoExW")
)

// lpCalInfoEnumProcEx (CALINFO_ENUMPROCEXW), Locale (DWORD), Calendar (DWORD), CalType (DWORD)
r1, _, err := procEnumCalendarInfoExW.Call(
	uintptr(lpCalInfoEnumProcEx),
	uintptr(Locale),
	uintptr(Calendar),
	uintptr(CalType),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function EnumCalendarInfoExW(
  lpCalInfoEnumProcEx: Pointer;   // CALINFO_ENUMPROCEXW
  Locale: DWORD;   // DWORD
  Calendar: DWORD;   // DWORD
  CalType: DWORD   // DWORD
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'EnumCalendarInfoExW';

result := DllCall("KERNEL32\EnumCalendarInfoExW"
    , "Ptr", lpCalInfoEnumProcEx   ; CALINFO_ENUMPROCEXW
    , "UInt", Locale   ; DWORD
    , "UInt", Calendar   ; DWORD
    , "UInt", CalType   ; DWORD
    , "Int")   ; return: BOOL

●EnumCalendarInfoExW(lpCalInfoEnumProcEx, Locale, Calendar, CalType) = DLL("KERNEL32.dll", "bool EnumCalendarInfoExW(void*, dword, dword, dword)")
# 呼び出し: EnumCalendarInfoExW(lpCalInfoEnumProcEx, Locale, Calendar, CalType)
# lpCalInfoEnumProcEx : CALINFO_ENUMPROCEXW -> "void*"
# Locale : DWORD -> "dword"
# Calendar : DWORD -> "dword"
# CalType : 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。