StrToInt64ExW

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

BOOL StrToInt64ExW(
    LPCWSTR pszString,
    INT dwFlags,
    LONGLONG* pllRet
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function StrToInt64ExW(
    <MarshalAs(UnmanagedType.LPWStr)> pszString As String,   ' LPCWSTR
    dwFlags As Integer,   ' INT
    <Out> ByRef pllRet As Long   ' LONGLONG* out
) As Boolean
End Function

' pszString : LPCWSTR
' dwFlags : INT
' pllRet : LONGLONG* out
Declare PtrSafe Function StrToInt64ExW Lib "shlwapi" ( _
    ByVal pszString As LongPtr, _
    ByVal dwFlags As Long, _
    ByRef pllRet As LongLong) 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

StrToInt64ExW = ctypes.windll.shlwapi.StrToInt64ExW
StrToInt64ExW.restype = wintypes.BOOL
StrToInt64ExW.argtypes = [
    wintypes.LPCWSTR,  # pszString : LPCWSTR
    ctypes.c_int,  # dwFlags : INT
    ctypes.POINTER(ctypes.c_longlong),  # pllRet : LONGLONG* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
StrToInt64ExW = Fiddle::Function.new(
  lib['StrToInt64ExW'],
  [
    Fiddle::TYPE_VOIDP,  # pszString : LPCWSTR
    Fiddle::TYPE_INT,  # dwFlags : INT
    Fiddle::TYPE_VOIDP,  # pllRet : LONGLONG* out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "shlwapi")]
extern "system" {
    fn StrToInt64ExW(
        pszString: *const u16,  // LPCWSTR
        dwFlags: i32,  // INT
        pllRet: *mut i64  // LONGLONG* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("SHLWAPI.dll", CharSet = CharSet.Unicode)]
public static extern bool StrToInt64ExW([MarshalAs(UnmanagedType.LPWStr)] string pszString, int dwFlags, out long pllRet);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_StrToInt64ExW' -Namespace Win32 -PassThru
# $api::StrToInt64ExW(pszString, dwFlags, pllRet)

#uselib "SHLWAPI.dll"
#func global StrToInt64ExW "StrToInt64ExW" wptr, wptr, wptr
; StrToInt64ExW pszString, dwFlags, varptr(pllRet)   ; 戻り値は stat
; pszString : LPCWSTR -> "wptr"
; dwFlags : INT -> "wptr"
; pllRet : LONGLONG* out -> "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 "SHLWAPI.dll"
#cfunc global StrToInt64ExW "StrToInt64ExW" wstr, int, var
; res = StrToInt64ExW(pszString, dwFlags, pllRet)
; pszString : LPCWSTR -> "wstr"
; dwFlags : INT -> "int"
; pllRet : LONGLONG* out -> "var"
; ※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。

; BOOL StrToInt64ExW(LPCWSTR pszString, INT dwFlags, LONGLONG* pllRet)
#uselib "SHLWAPI.dll"
#cfunc global StrToInt64ExW "StrToInt64ExW" wstr, int, var
; res = StrToInt64ExW(pszString, dwFlags, pllRet)
; pszString : LPCWSTR -> "wstr"
; dwFlags : INT -> "int"
; pllRet : LONGLONG* out -> "var"
; ※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 (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procStrToInt64ExW = shlwapi.NewProc("StrToInt64ExW")
)

// pszString (LPCWSTR), dwFlags (INT), pllRet (LONGLONG* out)
r1, _, err := procStrToInt64ExW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszString))),
	uintptr(dwFlags),
	uintptr(pllRet),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function StrToInt64ExW(
  pszString: PWideChar;   // LPCWSTR
  dwFlags: Integer;   // INT
  pllRet: Pointer   // LONGLONG* out
): BOOL; stdcall;
  external 'SHLWAPI.dll' name 'StrToInt64ExW';

result := DllCall("SHLWAPI\StrToInt64ExW"
    , "WStr", pszString   ; LPCWSTR
    , "Int", dwFlags   ; INT
    , "Ptr", pllRet   ; LONGLONG* out
    , "Int")   ; return: BOOL

●StrToInt64ExW(pszString, dwFlags, pllRet) = DLL("SHLWAPI.dll", "bool StrToInt64ExW(char*, int, void*)")
# 呼び出し: StrToInt64ExW(pszString, dwFlags, pllRet)
# pszString : LPCWSTR -> "char*"
# dwFlags : INT -> "int"
# pllRet : LONGLONG* 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。