GetNumberFormatW

// KERNEL32.dll  (Unicode / -W)
#include <windows.h>

INT GetNumberFormatW(
    DWORD Locale,
    DWORD dwFlags,
    LPCWSTR lpValue,
    const NUMBERFMTW* lpFormat,   // optional
    LPWSTR lpNumberStr,   // optional
    INT cchNumber
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetNumberFormatW(
    Locale As UInteger,   ' DWORD
    dwFlags As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> lpValue As String,   ' LPCWSTR
    lpFormat As IntPtr,   ' NUMBERFMTW* optional
    <MarshalAs(UnmanagedType.LPWStr)> lpNumberStr As System.Text.StringBuilder,   ' LPWSTR optional, out
    cchNumber As Integer   ' INT
) As Integer
End Function

' Locale : DWORD
' dwFlags : DWORD
' lpValue : LPCWSTR
' lpFormat : NUMBERFMTW* optional
' lpNumberStr : LPWSTR optional, out
' cchNumber : INT
Declare PtrSafe Function GetNumberFormatW Lib "kernel32" ( _
    ByVal Locale As Long, _
    ByVal dwFlags As Long, _
    ByVal lpValue As LongPtr, _
    ByVal lpFormat As LongPtr, _
    ByVal lpNumberStr As LongPtr, _
    ByVal cchNumber As Long) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetNumberFormatW = ctypes.windll.kernel32.GetNumberFormatW
GetNumberFormatW.restype = ctypes.c_int
GetNumberFormatW.argtypes = [
    wintypes.DWORD,  # Locale : DWORD
    wintypes.DWORD,  # dwFlags : DWORD
    wintypes.LPCWSTR,  # lpValue : LPCWSTR
    ctypes.c_void_p,  # lpFormat : NUMBERFMTW* optional
    wintypes.LPWSTR,  # lpNumberStr : LPWSTR optional, out
    ctypes.c_int,  # cchNumber : INT
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetNumberFormatW = Fiddle::Function.new(
  lib['GetNumberFormatW'],
  [
    -Fiddle::TYPE_INT,  # Locale : DWORD
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    Fiddle::TYPE_VOIDP,  # lpValue : LPCWSTR
    Fiddle::TYPE_VOIDP,  # lpFormat : NUMBERFMTW* optional
    Fiddle::TYPE_VOIDP,  # lpNumberStr : LPWSTR optional, out
    Fiddle::TYPE_INT,  # cchNumber : INT
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "kernel32")]
extern "system" {
    fn GetNumberFormatW(
        Locale: u32,  // DWORD
        dwFlags: u32,  // DWORD
        lpValue: *const u16,  // LPCWSTR
        lpFormat: *const NUMBERFMTW,  // NUMBERFMTW* optional
        lpNumberStr: *mut u16,  // LPWSTR optional, out
        cchNumber: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern int GetNumberFormatW(uint Locale, uint dwFlags, [MarshalAs(UnmanagedType.LPWStr)] string lpValue, IntPtr lpFormat, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpNumberStr, int cchNumber);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetNumberFormatW' -Namespace Win32 -PassThru
# $api::GetNumberFormatW(Locale, dwFlags, lpValue, lpFormat, lpNumberStr, cchNumber)

#uselib "KERNEL32.dll"
#func global GetNumberFormatW "GetNumberFormatW" wptr, wptr, wptr, wptr, wptr, wptr
; GetNumberFormatW Locale, dwFlags, lpValue, varptr(lpFormat), varptr(lpNumberStr), cchNumber   ; 戻り値は stat
; Locale : DWORD -> "wptr"
; dwFlags : DWORD -> "wptr"
; lpValue : LPCWSTR -> "wptr"
; lpFormat : NUMBERFMTW* optional -> "wptr"
; lpNumberStr : LPWSTR optional, out -> "wptr"
; cchNumber : INT -> "wptr"
; ※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 "KERNEL32.dll"
#cfunc global GetNumberFormatW "GetNumberFormatW" int, int, wstr, var, var, int
; res = GetNumberFormatW(Locale, dwFlags, lpValue, lpFormat, lpNumberStr, cchNumber)
; Locale : DWORD -> "int"
; dwFlags : DWORD -> "int"
; lpValue : LPCWSTR -> "wstr"
; lpFormat : NUMBERFMTW* optional -> "var"
; lpNumberStr : LPWSTR optional, out -> "var"
; cchNumber : INT -> "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 GetNumberFormatW(DWORD Locale, DWORD dwFlags, LPCWSTR lpValue, NUMBERFMTW* lpFormat, LPWSTR lpNumberStr, INT cchNumber)
#uselib "KERNEL32.dll"
#cfunc global GetNumberFormatW "GetNumberFormatW" int, int, wstr, var, var, int
; res = GetNumberFormatW(Locale, dwFlags, lpValue, lpFormat, lpNumberStr, cchNumber)
; Locale : DWORD -> "int"
; dwFlags : DWORD -> "int"
; lpValue : LPCWSTR -> "wstr"
; lpFormat : NUMBERFMTW* optional -> "var"
; lpNumberStr : LPWSTR optional, out -> "var"
; cchNumber : INT -> "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 (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procGetNumberFormatW = kernel32.NewProc("GetNumberFormatW")
)

// Locale (DWORD), dwFlags (DWORD), lpValue (LPCWSTR), lpFormat (NUMBERFMTW* optional), lpNumberStr (LPWSTR optional, out), cchNumber (INT)
r1, _, err := procGetNumberFormatW.Call(
	uintptr(Locale),
	uintptr(dwFlags),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpValue))),
	uintptr(lpFormat),
	uintptr(lpNumberStr),
	uintptr(cchNumber),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function GetNumberFormatW(
  Locale: DWORD;   // DWORD
  dwFlags: DWORD;   // DWORD
  lpValue: PWideChar;   // LPCWSTR
  lpFormat: Pointer;   // NUMBERFMTW* optional
  lpNumberStr: PWideChar;   // LPWSTR optional, out
  cchNumber: Integer   // INT
): Integer; stdcall;
  external 'KERNEL32.dll' name 'GetNumberFormatW';

result := DllCall("KERNEL32\GetNumberFormatW"
    , "UInt", Locale   ; DWORD
    , "UInt", dwFlags   ; DWORD
    , "WStr", lpValue   ; LPCWSTR
    , "Ptr", lpFormat   ; NUMBERFMTW* optional
    , "Ptr", lpNumberStr   ; LPWSTR optional, out
    , "Int", cchNumber   ; INT
    , "Int")   ; return: INT

●GetNumberFormatW(Locale, dwFlags, lpValue, lpFormat, lpNumberStr, cchNumber) = DLL("KERNEL32.dll", "int GetNumberFormatW(dword, dword, char*, void*, char*, int)")
# 呼び出し: GetNumberFormatW(Locale, dwFlags, lpValue, lpFormat, lpNumberStr, cchNumber)
# Locale : DWORD -> "dword"
# dwFlags : DWORD -> "dword"
# lpValue : LPCWSTR -> "char*"
# lpFormat : NUMBERFMTW* optional -> "void*"
# lpNumberStr : LPWSTR optional, out -> "char*"
# cchNumber : INT -> "int"
# 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。