uldn_getContext

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

UDisplayContext uldn_getContext(
    const ULocaleDisplayNames* ldn,
    UDisplayContextType type,
    UErrorCode* pErrorCode
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function uldn_getContext(
    ByRef ldn As IntPtr,   ' ULocaleDisplayNames*
    type As Integer,   ' UDisplayContextType
    ByRef pErrorCode As Integer   ' UErrorCode* in/out
) As Integer
End Function

' ldn : ULocaleDisplayNames*
' type : UDisplayContextType
' pErrorCode : UErrorCode* in/out
Declare PtrSafe Function uldn_getContext Lib "icuuc" ( _
    ByRef ldn As LongPtr, _
    ByVal type As Long, _
    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

uldn_getContext = ctypes.cdll.icuuc.uldn_getContext
uldn_getContext.restype = ctypes.c_int
uldn_getContext.argtypes = [
    ctypes.c_void_p,  # ldn : ULocaleDisplayNames*
    ctypes.c_int,  # type : UDisplayContextType
    ctypes.c_void_p,  # pErrorCode : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
uldn_getContext = Fiddle::Function.new(
  lib['uldn_getContext'],
  [
    Fiddle::TYPE_VOIDP,  # ldn : ULocaleDisplayNames*
    Fiddle::TYPE_INT,  # type : UDisplayContextType
    Fiddle::TYPE_VOIDP,  # pErrorCode : UErrorCode* in/out
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuuc")]
extern "C" {
    fn uldn_getContext(
        ldn: *const isize,  // ULocaleDisplayNames*
        type: i32,  // UDisplayContextType
        pErrorCode: *mut i32  // UErrorCode* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuuc.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int uldn_getContext(ref IntPtr ldn, int type, ref int pErrorCode);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_uldn_getContext' -Namespace Win32 -PassThru
# $api::uldn_getContext(ldn, type, pErrorCode)

#uselib "icuuc.dll"
#func global uldn_getContext "uldn_getContext" sptr, sptr, sptr
; uldn_getContext ldn, type, pErrorCode   ; 戻り値は stat
; ldn : ULocaleDisplayNames* -> "sptr"
; type : UDisplayContextType -> "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 "icuuc.dll"
#cfunc global uldn_getContext "uldn_getContext" int, int, int
; res = uldn_getContext(ldn, type, pErrorCode)
; ldn : ULocaleDisplayNames* -> "int"
; type : UDisplayContextType -> "int"
; pErrorCode : UErrorCode* in/out -> "int"

; UDisplayContext uldn_getContext(ULocaleDisplayNames* ldn, UDisplayContextType type, UErrorCode* pErrorCode)
#uselib "icuuc.dll"
#cfunc global uldn_getContext "uldn_getContext" int, int, int
; res = uldn_getContext(ldn, type, pErrorCode)
; ldn : ULocaleDisplayNames* -> "int"
; type : UDisplayContextType -> "int"
; pErrorCode : UErrorCode* in/out -> "int"

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

var (
	icuuc = windows.NewLazySystemDLL("icuuc.dll")
	proculdn_getContext = icuuc.NewProc("uldn_getContext")
)

// ldn (ULocaleDisplayNames*), type (UDisplayContextType), pErrorCode (UErrorCode* in/out)
r1, _, err := proculdn_getContext.Call(
	uintptr(ldn),
	uintptr(type),
	uintptr(pErrorCode),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // UDisplayContext

function uldn_getContext(
  ldn: Pointer;   // ULocaleDisplayNames*
  type: Integer;   // UDisplayContextType
  pErrorCode: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuuc.dll' name 'uldn_getContext';

result := DllCall("icuuc\uldn_getContext"
    , "Ptr", ldn   ; ULocaleDisplayNames*
    , "Int", type   ; UDisplayContextType
    , "Ptr", pErrorCode   ; UErrorCode* in/out
    , "Cdecl Int")   ; return: UDisplayContext

●uldn_getContext(ldn, type, pErrorCode) = DLL("icuuc.dll", "int uldn_getContext(void*, int, void*)")
# 呼び出し: uldn_getContext(ldn, type, pErrorCode)
# ldn : ULocaleDisplayNames* -> "void*"
# type : UDisplayContextType -> "int"
# 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。