udatpg_open

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

void** udatpg_open(
    LPCSTR locale,
    UErrorCode* pErrorCode
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function udatpg_open(
    <MarshalAs(UnmanagedType.LPStr)> locale As String,   ' LPCSTR
    ByRef pErrorCode As Integer   ' UErrorCode* in/out
) As IntPtr
End Function

' locale : LPCSTR
' pErrorCode : UErrorCode* in/out
Declare PtrSafe Function udatpg_open Lib "icuin" ( _
    ByVal locale As String, _
    ByRef pErrorCode As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

udatpg_open = ctypes.cdll.icuin.udatpg_open
udatpg_open.restype = ctypes.c_void_p
udatpg_open.argtypes = [
    wintypes.LPCSTR,  # locale : LPCSTR
    ctypes.c_void_p,  # pErrorCode : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
udatpg_open = Fiddle::Function.new(
  lib['udatpg_open'],
  [
    Fiddle::TYPE_VOIDP,  # locale : LPCSTR
    Fiddle::TYPE_VOIDP,  # pErrorCode : UErrorCode* in/out
  ],
  Fiddle::TYPE_VOIDP, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn udatpg_open(
        locale: *const u8,  // LPCSTR
        pErrorCode: *mut i32  // UErrorCode* in/out
    ) -> *mut *mut ();
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuin.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern IntPtr udatpg_open([MarshalAs(UnmanagedType.LPStr)] string locale, ref int pErrorCode);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuin_udatpg_open' -Namespace Win32 -PassThru
# $api::udatpg_open(locale, pErrorCode)

#uselib "icuin.dll"
#func global udatpg_open "udatpg_open" sptr, sptr
; udatpg_open locale, pErrorCode   ; 戻り値は stat
; locale : LPCSTR -> "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 "icuin.dll"
#cfunc global udatpg_open "udatpg_open" str, int
; res = udatpg_open(locale, pErrorCode)
; locale : LPCSTR -> "str"
; pErrorCode : UErrorCode* in/out -> "int"

; void** udatpg_open(LPCSTR locale, UErrorCode* pErrorCode)
#uselib "icuin.dll"
#cfunc global udatpg_open "udatpg_open" str, int
; res = udatpg_open(locale, pErrorCode)
; locale : LPCSTR -> "str"
; pErrorCode : UErrorCode* in/out -> "int"

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

var (
	icuin = windows.NewLazySystemDLL("icuin.dll")
	procudatpg_open = icuin.NewProc("udatpg_open")
)

// locale (LPCSTR), pErrorCode (UErrorCode* in/out)
r1, _, err := procudatpg_open.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(locale))),
	uintptr(pErrorCode),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void**

function udatpg_open(
  locale: PAnsiChar;   // LPCSTR
  pErrorCode: Pointer   // UErrorCode* in/out
): Pointer; cdecl;
  external 'icuin.dll' name 'udatpg_open';

result := DllCall("icuin\udatpg_open"
    , "AStr", locale   ; LPCSTR
    , "Ptr", pErrorCode   ; UErrorCode* in/out
    , "Cdecl Ptr")   ; return: void**

●udatpg_open(locale, pErrorCode) = DLL("icuin.dll", "void* udatpg_open(char*, void*)")
# 呼び出し: udatpg_open(locale, pErrorCode)
# locale : LPCSTR -> "char*"
# 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。