udat_setSymbols

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

void udat_setSymbols(
    void** format,
    UDateFormatSymbolType type,
    INT symbolIndex,
    WORD* value,
    INT valueLength,
    UErrorCode* status
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Sub udat_setSymbols(
    format As IntPtr,   ' void** in/out
    type As Integer,   ' UDateFormatSymbolType
    symbolIndex As Integer,   ' INT
    ByRef value As UShort,   ' WORD* in/out
    valueLength As Integer,   ' INT
    ByRef status As Integer   ' UErrorCode* in/out
)
End Sub

' format : void** in/out
' type : UDateFormatSymbolType
' symbolIndex : INT
' value : WORD* in/out
' valueLength : INT
' status : UErrorCode* in/out
Declare PtrSafe Sub udat_setSymbols Lib "icuin" ( _
    ByVal format As LongPtr, _
    ByVal type As Long, _
    ByVal symbolIndex As Long, _
    ByRef value As Integer, _
    ByVal valueLength As Long, _
    ByRef status As Long)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

udat_setSymbols = ctypes.cdll.icuin.udat_setSymbols
udat_setSymbols.restype = None
udat_setSymbols.argtypes = [
    ctypes.c_void_p,  # format : void** in/out
    ctypes.c_int,  # type : UDateFormatSymbolType
    ctypes.c_int,  # symbolIndex : INT
    ctypes.POINTER(ctypes.c_ushort),  # value : WORD* in/out
    ctypes.c_int,  # valueLength : INT
    ctypes.c_void_p,  # status : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
udat_setSymbols = Fiddle::Function.new(
  lib['udat_setSymbols'],
  [
    Fiddle::TYPE_VOIDP,  # format : void** in/out
    Fiddle::TYPE_INT,  # type : UDateFormatSymbolType
    Fiddle::TYPE_INT,  # symbolIndex : INT
    Fiddle::TYPE_VOIDP,  # value : WORD* in/out
    Fiddle::TYPE_INT,  # valueLength : INT
    Fiddle::TYPE_VOIDP,  # status : UErrorCode* in/out
  ],
  Fiddle::TYPE_VOID, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn udat_setSymbols(
        format: *mut *mut (),  // void** in/out
        type: i32,  // UDateFormatSymbolType
        symbolIndex: i32,  // INT
        value: *mut u16,  // WORD* in/out
        valueLength: i32,  // INT
        status: *mut i32  // UErrorCode* in/out
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuin.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern void udat_setSymbols(IntPtr format, int type, int symbolIndex, ref ushort value, int valueLength, ref int status);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuin_udat_setSymbols' -Namespace Win32 -PassThru
# $api::udat_setSymbols(format, type, symbolIndex, value, valueLength, status)

#uselib "icuin.dll"
#func global udat_setSymbols "udat_setSymbols" sptr, sptr, sptr, sptr, sptr, sptr
; udat_setSymbols format, type, symbolIndex, varptr(value), valueLength, status
; format : void** in/out -> "sptr"
; type : UDateFormatSymbolType -> "sptr"
; symbolIndex : INT -> "sptr"
; value : WORD* in/out -> "sptr"
; valueLength : INT -> "sptr"
; status : UErrorCode* in/out -> "sptr"

#uselib "icuin.dll"
#func global udat_setSymbols "udat_setSymbols" sptr, int, int, var, int, int
; udat_setSymbols format, type, symbolIndex, value, valueLength, status
; format : void** in/out -> "sptr"
; type : UDateFormatSymbolType -> "int"
; symbolIndex : INT -> "int"
; value : WORD* in/out -> "var"
; valueLength : 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。

; void udat_setSymbols(void** format, UDateFormatSymbolType type, INT symbolIndex, WORD* value, INT valueLength, UErrorCode* status)
#uselib "icuin.dll"
#func global udat_setSymbols "udat_setSymbols" intptr, int, int, var, int, int
; udat_setSymbols format, type, symbolIndex, value, valueLength, status
; format : void** in/out -> "intptr"
; type : UDateFormatSymbolType -> "int"
; symbolIndex : INT -> "int"
; value : WORD* in/out -> "var"
; valueLength : 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")
	procudat_setSymbols = icuin.NewProc("udat_setSymbols")
)

// format (void** in/out), type (UDateFormatSymbolType), symbolIndex (INT), value (WORD* in/out), valueLength (INT), status (UErrorCode* in/out)
r1, _, err := procudat_setSymbols.Call(
	uintptr(format),
	uintptr(type),
	uintptr(symbolIndex),
	uintptr(value),
	uintptr(valueLength),
	uintptr(status),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure udat_setSymbols(
  format: Pointer;   // void** in/out
  type: Integer;   // UDateFormatSymbolType
  symbolIndex: Integer;   // INT
  value: Pointer;   // WORD* in/out
  valueLength: Integer;   // INT
  status: Pointer   // UErrorCode* in/out
); cdecl;
  external 'icuin.dll' name 'udat_setSymbols';

result := DllCall("icuin\udat_setSymbols"
    , "Ptr", format   ; void** in/out
    , "Int", type   ; UDateFormatSymbolType
    , "Int", symbolIndex   ; INT
    , "Ptr", value   ; WORD* in/out
    , "Int", valueLength   ; INT
    , "Ptr", status   ; UErrorCode* in/out
    , "Cdecl Int")   ; return: void

●udat_setSymbols(format, type, symbolIndex, value, valueLength, status) = DLL("icuin.dll", "int udat_setSymbols(void*, int, int, void*, int, void*)")
# 呼び出し: udat_setSymbols(format, type, symbolIndex, value, valueLength, status)
# format : void** in/out -> "void*"
# type : UDateFormatSymbolType -> "int"
# symbolIndex : INT -> "int"
# value : WORD* in/out -> "void*"
# valueLength : 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。