udatpg_getDefaultHourCycle

// icu.dll
#include <windows.h>

UDateFormatHourCycle udatpg_getDefaultHourCycle(
    const void** dtpg,
    UErrorCode* pErrorCode
);

<DllImport("icu.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function udatpg_getDefaultHourCycle(
    dtpg As IntPtr,   ' void**
    ByRef pErrorCode As Integer   ' UErrorCode* in/out
) As Integer
End Function

' dtpg : void**
' pErrorCode : UErrorCode* in/out
Declare PtrSafe Function udatpg_getDefaultHourCycle Lib "icu" ( _
    ByVal dtpg As LongPtr, _
    ByRef pErrorCode As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

udatpg_getDefaultHourCycle = ctypes.cdll.icu.udatpg_getDefaultHourCycle
udatpg_getDefaultHourCycle.restype = ctypes.c_int
udatpg_getDefaultHourCycle.argtypes = [
    ctypes.c_void_p,  # dtpg : void**
    ctypes.c_void_p,  # pErrorCode : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icu.dll')
udatpg_getDefaultHourCycle = Fiddle::Function.new(
  lib['udatpg_getDefaultHourCycle'],
  [
    Fiddle::TYPE_VOIDP,  # dtpg : void**
    Fiddle::TYPE_VOIDP,  # pErrorCode : UErrorCode* in/out
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icu")]
extern "C" {
    fn udatpg_getDefaultHourCycle(
        dtpg: *const *const (),  // void**
        pErrorCode: *mut i32  // UErrorCode* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icu.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int udatpg_getDefaultHourCycle(IntPtr dtpg, ref int pErrorCode);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icu_udatpg_getDefaultHourCycle' -Namespace Win32 -PassThru
# $api::udatpg_getDefaultHourCycle(dtpg, pErrorCode)

#uselib "icu.dll"
#func global udatpg_getDefaultHourCycle "udatpg_getDefaultHourCycle" sptr, sptr
; udatpg_getDefaultHourCycle dtpg, pErrorCode   ; 戻り値は stat
; dtpg : void** -> "sptr"
; pErrorCode : UErrorCode* in/out -> "sptr"
; ※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 "icu.dll"
#cfunc global udatpg_getDefaultHourCycle "udatpg_getDefaultHourCycle" sptr, int
; res = udatpg_getDefaultHourCycle(dtpg, pErrorCode)
; dtpg : void** -> "sptr"
; pErrorCode : UErrorCode* in/out -> "int"

; UDateFormatHourCycle udatpg_getDefaultHourCycle(void** dtpg, UErrorCode* pErrorCode)
#uselib "icu.dll"
#cfunc global udatpg_getDefaultHourCycle "udatpg_getDefaultHourCycle" intptr, int
; res = udatpg_getDefaultHourCycle(dtpg, pErrorCode)
; dtpg : void** -> "intptr"
; pErrorCode : UErrorCode* in/out -> "int"

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

var (
	icu = windows.NewLazySystemDLL("icu.dll")
	procudatpg_getDefaultHourCycle = icu.NewProc("udatpg_getDefaultHourCycle")
)

// dtpg (void**), pErrorCode (UErrorCode* in/out)
r1, _, err := procudatpg_getDefaultHourCycle.Call(
	uintptr(dtpg),
	uintptr(pErrorCode),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // UDateFormatHourCycle

function udatpg_getDefaultHourCycle(
  dtpg: Pointer;   // void**
  pErrorCode: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icu.dll' name 'udatpg_getDefaultHourCycle';

result := DllCall("icu\udatpg_getDefaultHourCycle"
    , "Ptr", dtpg   ; void**
    , "Ptr", pErrorCode   ; UErrorCode* in/out
    , "Cdecl Int")   ; return: UDateFormatHourCycle

●udatpg_getDefaultHourCycle(dtpg, pErrorCode) = DLL("icu.dll", "int udatpg_getDefaultHourCycle(void*, void*)")
# 呼び出し: udatpg_getDefaultHourCycle(dtpg, pErrorCode)
# dtpg : void** -> "void*"
# pErrorCode : UErrorCode* in/out -> "void*"
# 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)。
# ※cdecl関数。DLL()宣言はstdcall前提。cdeclは EXEC_PTR(`cdecl`,…) を使用。