WsFileTimeToDateTime

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

HRESULT WsFileTimeToDateTime(
    const FILETIME* fileTime,
    WS_DATETIME* dateTime,
    WS_ERROR* error   // optional
);

<DllImport("webservices.dll", ExactSpelling:=True)>
Public Shared Function WsFileTimeToDateTime(
    fileTime As IntPtr,   ' FILETIME*
    dateTime As IntPtr,   ' WS_DATETIME* out
    [error] As IntPtr   ' WS_ERROR* optional
) As Integer
End Function

' fileTime : FILETIME*
' dateTime : WS_DATETIME* out
' error : WS_ERROR* optional
Declare PtrSafe Function WsFileTimeToDateTime Lib "webservices" ( _
    ByVal fileTime As LongPtr, _
    ByVal dateTime As LongPtr, _
    ByVal error As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

WsFileTimeToDateTime = ctypes.windll.webservices.WsFileTimeToDateTime
WsFileTimeToDateTime.restype = ctypes.c_int
WsFileTimeToDateTime.argtypes = [
    ctypes.c_void_p,  # fileTime : FILETIME*
    ctypes.c_void_p,  # dateTime : WS_DATETIME* out
    ctypes.c_void_p,  # error : WS_ERROR* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('webservices.dll')
WsFileTimeToDateTime = Fiddle::Function.new(
  lib['WsFileTimeToDateTime'],
  [
    Fiddle::TYPE_VOIDP,  # fileTime : FILETIME*
    Fiddle::TYPE_VOIDP,  # dateTime : WS_DATETIME* out
    Fiddle::TYPE_VOIDP,  # error : WS_ERROR* optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "webservices")]
extern "system" {
    fn WsFileTimeToDateTime(
        fileTime: *const FILETIME,  // FILETIME*
        dateTime: *mut WS_DATETIME,  // WS_DATETIME* out
        error: *mut isize  // WS_ERROR* optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("webservices.dll")]
public static extern int WsFileTimeToDateTime(IntPtr fileTime, IntPtr dateTime, IntPtr error);
"@
$api = Add-Type -MemberDefinition $sig -Name 'webservices_WsFileTimeToDateTime' -Namespace Win32 -PassThru
# $api::WsFileTimeToDateTime(fileTime, dateTime, error)

#uselib "webservices.dll"
#func global WsFileTimeToDateTime "WsFileTimeToDateTime" sptr, sptr, sptr
; WsFileTimeToDateTime varptr(fileTime), varptr(dateTime), error   ; 戻り値は stat
; fileTime : FILETIME* -> "sptr"
; dateTime : WS_DATETIME* out -> "sptr"
; error : WS_ERROR* optional -> "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 "webservices.dll"
#cfunc global WsFileTimeToDateTime "WsFileTimeToDateTime" var, var, int
; res = WsFileTimeToDateTime(fileTime, dateTime, error)
; fileTime : FILETIME* -> "var"
; dateTime : WS_DATETIME* out -> "var"
; error : WS_ERROR* optional -> "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。

; HRESULT WsFileTimeToDateTime(FILETIME* fileTime, WS_DATETIME* dateTime, WS_ERROR* error)
#uselib "webservices.dll"
#cfunc global WsFileTimeToDateTime "WsFileTimeToDateTime" var, var, int
; res = WsFileTimeToDateTime(fileTime, dateTime, error)
; fileTime : FILETIME* -> "var"
; dateTime : WS_DATETIME* out -> "var"
; error : WS_ERROR* optional -> "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 (
	webservices = windows.NewLazySystemDLL("webservices.dll")
	procWsFileTimeToDateTime = webservices.NewProc("WsFileTimeToDateTime")
)

// fileTime (FILETIME*), dateTime (WS_DATETIME* out), error (WS_ERROR* optional)
r1, _, err := procWsFileTimeToDateTime.Call(
	uintptr(fileTime),
	uintptr(dateTime),
	uintptr(error),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function WsFileTimeToDateTime(
  fileTime: Pointer;   // FILETIME*
  dateTime: Pointer;   // WS_DATETIME* out
  error: Pointer   // WS_ERROR* optional
): Integer; stdcall;
  external 'webservices.dll' name 'WsFileTimeToDateTime';

result := DllCall("webservices\WsFileTimeToDateTime"
    , "Ptr", fileTime   ; FILETIME*
    , "Ptr", dateTime   ; WS_DATETIME* out
    , "Ptr", error   ; WS_ERROR* optional
    , "Int")   ; return: HRESULT

●WsFileTimeToDateTime(fileTime, dateTime, error) = DLL("webservices.dll", "int WsFileTimeToDateTime(void*, void*, void*)")
# 呼び出し: WsFileTimeToDateTime(fileTime, dateTime, error)
# fileTime : FILETIME* -> "void*"
# dateTime : WS_DATETIME* out -> "void*"
# error : WS_ERROR* optional -> "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)。