unum_getSymbol

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

INT unum_getSymbol(
    const void** fmt,
    UNumberFormatSymbol symbol,
    WORD* buffer,
    INT size,
    UErrorCode* status
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function unum_getSymbol(
    fmt As IntPtr,   ' void**
    symbol As Integer,   ' UNumberFormatSymbol
    ByRef buffer As UShort,   ' WORD* in/out
    size As Integer,   ' INT
    ByRef status As Integer   ' UErrorCode* in/out
) As Integer
End Function

' fmt : void**
' symbol : UNumberFormatSymbol
' buffer : WORD* in/out
' size : INT
' status : UErrorCode* in/out
Declare PtrSafe Function unum_getSymbol Lib "icuin" ( _
    ByVal fmt As LongPtr, _
    ByVal symbol As Long, _
    ByRef buffer As Integer, _
    ByVal size As Long, _
    ByRef status 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

unum_getSymbol = ctypes.cdll.icuin.unum_getSymbol
unum_getSymbol.restype = ctypes.c_int
unum_getSymbol.argtypes = [
    ctypes.c_void_p,  # fmt : void**
    ctypes.c_int,  # symbol : UNumberFormatSymbol
    ctypes.POINTER(ctypes.c_ushort),  # buffer : WORD* in/out
    ctypes.c_int,  # size : INT
    ctypes.c_void_p,  # status : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
unum_getSymbol = Fiddle::Function.new(
  lib['unum_getSymbol'],
  [
    Fiddle::TYPE_VOIDP,  # fmt : void**
    Fiddle::TYPE_INT,  # symbol : UNumberFormatSymbol
    Fiddle::TYPE_VOIDP,  # buffer : WORD* in/out
    Fiddle::TYPE_INT,  # size : INT
    Fiddle::TYPE_VOIDP,  # status : UErrorCode* in/out
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn unum_getSymbol(
        fmt: *const *const (),  // void**
        symbol: i32,  // UNumberFormatSymbol
        buffer: *mut u16,  // WORD* in/out
        size: i32,  // INT
        status: *mut i32  // UErrorCode* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuin.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int unum_getSymbol(IntPtr fmt, int symbol, ref ushort buffer, int size, ref int status);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuin_unum_getSymbol' -Namespace Win32 -PassThru
# $api::unum_getSymbol(fmt, symbol, buffer, size, status)

#uselib "icuin.dll"
#func global unum_getSymbol "unum_getSymbol" sptr, sptr, sptr, sptr, sptr
; unum_getSymbol fmt, symbol, varptr(buffer), size, status   ; 戻り値は stat
; fmt : void** -> "sptr"
; symbol : UNumberFormatSymbol -> "sptr"
; buffer : WORD* in/out -> "sptr"
; size : INT -> "sptr"
; status : 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 unum_getSymbol "unum_getSymbol" sptr, int, var, int, int
; res = unum_getSymbol(fmt, symbol, buffer, size, status)
; fmt : void** -> "sptr"
; symbol : UNumberFormatSymbol -> "int"
; buffer : WORD* in/out -> "var"
; size : INT -> "int"
; status : UErrorCode* in/out -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; INT unum_getSymbol(void** fmt, UNumberFormatSymbol symbol, WORD* buffer, INT size, UErrorCode* status)
#uselib "icuin.dll"
#cfunc global unum_getSymbol "unum_getSymbol" intptr, int, var, int, int
; res = unum_getSymbol(fmt, symbol, buffer, size, status)
; fmt : void** -> "intptr"
; symbol : UNumberFormatSymbol -> "int"
; buffer : WORD* in/out -> "var"
; size : INT -> "int"
; status : UErrorCode* in/out -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	icuin = windows.NewLazySystemDLL("icuin.dll")
	procunum_getSymbol = icuin.NewProc("unum_getSymbol")
)

// fmt (void**), symbol (UNumberFormatSymbol), buffer (WORD* in/out), size (INT), status (UErrorCode* in/out)
r1, _, err := procunum_getSymbol.Call(
	uintptr(fmt),
	uintptr(symbol),
	uintptr(buffer),
	uintptr(size),
	uintptr(status),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function unum_getSymbol(
  fmt: Pointer;   // void**
  symbol: Integer;   // UNumberFormatSymbol
  buffer: Pointer;   // WORD* in/out
  size: Integer;   // INT
  status: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuin.dll' name 'unum_getSymbol';

result := DllCall("icuin\unum_getSymbol"
    , "Ptr", fmt   ; void**
    , "Int", symbol   ; UNumberFormatSymbol
    , "Ptr", buffer   ; WORD* in/out
    , "Int", size   ; INT
    , "Ptr", status   ; UErrorCode* in/out
    , "Cdecl Int")   ; return: INT

●unum_getSymbol(fmt, symbol, buffer, size, status) = DLL("icuin.dll", "int unum_getSymbol(void*, int, void*, int, void*)")
# 呼び出し: unum_getSymbol(fmt, symbol, buffer, size, status)
# fmt : void** -> "void*"
# symbol : UNumberFormatSymbol -> "int"
# buffer : WORD* in/out -> "void*"
# size : INT -> "int"
# status : 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。