DosDateTimeToVariantTime

// OLEAUT32.dll
#include <windows.h>

INT DosDateTimeToVariantTime(
    WORD wDosDate,
    WORD wDosTime,
    DOUBLE* pvtime
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function DosDateTimeToVariantTime(
    wDosDate As UShort,   ' WORD
    wDosTime As UShort,   ' WORD
    <Out> ByRef pvtime As Double   ' DOUBLE* out
) As Integer
End Function

' wDosDate : WORD
' wDosTime : WORD
' pvtime : DOUBLE* out
Declare PtrSafe Function DosDateTimeToVariantTime Lib "oleaut32" ( _
    ByVal wDosDate As Integer, _
    ByVal wDosTime As Integer, _
    ByRef pvtime As Double) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

DosDateTimeToVariantTime = ctypes.windll.oleaut32.DosDateTimeToVariantTime
DosDateTimeToVariantTime.restype = ctypes.c_int
DosDateTimeToVariantTime.argtypes = [
    ctypes.c_ushort,  # wDosDate : WORD
    ctypes.c_ushort,  # wDosTime : WORD
    ctypes.POINTER(ctypes.c_double),  # pvtime : DOUBLE* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
DosDateTimeToVariantTime = Fiddle::Function.new(
  lib['DosDateTimeToVariantTime'],
  [
    -Fiddle::TYPE_SHORT,  # wDosDate : WORD
    -Fiddle::TYPE_SHORT,  # wDosTime : WORD
    Fiddle::TYPE_VOIDP,  # pvtime : DOUBLE* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn DosDateTimeToVariantTime(
        wDosDate: u16,  // WORD
        wDosTime: u16,  // WORD
        pvtime: *mut f64  // DOUBLE* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int DosDateTimeToVariantTime(ushort wDosDate, ushort wDosTime, out double pvtime);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_DosDateTimeToVariantTime' -Namespace Win32 -PassThru
# $api::DosDateTimeToVariantTime(wDosDate, wDosTime, pvtime)

#uselib "OLEAUT32.dll"
#func global DosDateTimeToVariantTime "DosDateTimeToVariantTime" sptr, sptr, sptr
; DosDateTimeToVariantTime wDosDate, wDosTime, varptr(pvtime)   ; 戻り値は stat
; wDosDate : WORD -> "sptr"
; wDosTime : WORD -> "sptr"
; pvtime : DOUBLE* 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。

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

var (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procDosDateTimeToVariantTime = oleaut32.NewProc("DosDateTimeToVariantTime")
)

// wDosDate (WORD), wDosTime (WORD), pvtime (DOUBLE* out)
r1, _, err := procDosDateTimeToVariantTime.Call(
	uintptr(wDosDate),
	uintptr(wDosTime),
	uintptr(pvtime),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function DosDateTimeToVariantTime(
  wDosDate: Word;   // WORD
  wDosTime: Word;   // WORD
  pvtime: Pointer   // DOUBLE* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'DosDateTimeToVariantTime';

result := DllCall("OLEAUT32\DosDateTimeToVariantTime"
    , "UShort", wDosDate   ; WORD
    , "UShort", wDosTime   ; WORD
    , "Ptr", pvtime   ; DOUBLE* out
    , "Int")   ; return: INT

●DosDateTimeToVariantTime(wDosDate, wDosTime, pvtime) = DLL("OLEAUT32.dll", "int DosDateTimeToVariantTime(int, int, void*)")
# 呼び出し: DosDateTimeToVariantTime(wDosDate, wDosTime, pvtime)
# wDosDate : WORD -> "int"
# wDosTime : WORD -> "int"
# pvtime : DOUBLE* 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)。

const std = @import("std");

extern "oleaut32" fn DosDateTimeToVariantTime(
    wDosDate: u16, // WORD
    wDosTime: u16, // WORD
    pvtime: [*c]f64 // DOUBLE* out
) callconv(std.os.windows.WINAPI) i32;

proc DosDateTimeToVariantTime(
    wDosDate: uint16,  # WORD
    wDosTime: uint16,  # WORD
    pvtime: ptr float64  # DOUBLE* out
): int32 {.importc: "DosDateTimeToVariantTime", stdcall, dynlib: "OLEAUT32.dll".}

pragma(lib, "oleaut32");
extern(Windows)
int DosDateTimeToVariantTime(
    ushort wDosDate,   // WORD
    ushort wDosTime,   // WORD
    double* pvtime   // DOUBLE* out
);

ccall((:DosDateTimeToVariantTime, "OLEAUT32.dll"), stdcall, Int32,
      (UInt16, UInt16, Ptr{Float64}),
      wDosDate, wDosTime, pvtime)
# wDosDate : WORD -> UInt16
# wDosTime : WORD -> UInt16
# pvtime : DOUBLE* out -> Ptr{Float64}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t DosDateTimeToVariantTime(
    uint16_t wDosDate,
    uint16_t wDosTime,
    double* pvtime);
]]
local oleaut32 = ffi.load("oleaut32")
-- oleaut32.DosDateTimeToVariantTime(wDosDate, wDosTime, pvtime)
-- wDosDate : WORD
-- wDosTime : WORD
-- pvtime : DOUBLE* out
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('OLEAUT32.dll');
const DosDateTimeToVariantTime = lib.func('__stdcall', 'DosDateTimeToVariantTime', 'int32_t', ['uint16_t', 'uint16_t', 'double *']);
// DosDateTimeToVariantTime(wDosDate, wDosTime, pvtime)
// wDosDate : WORD -> 'uint16_t'
// wDosTime : WORD -> 'uint16_t'
// pvtime : DOUBLE* out -> 'double *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("OLEAUT32.dll", {
  DosDateTimeToVariantTime: { parameters: ["u16", "u16", "pointer"], result: "i32" },
});
// lib.symbols.DosDateTimeToVariantTime(wDosDate, wDosTime, pvtime)
// wDosDate : WORD -> "u16"
// wDosTime : WORD -> "u16"
// pvtime : DOUBLE* out -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t DosDateTimeToVariantTime(
    uint16_t wDosDate,
    uint16_t wDosTime,
    double* pvtime);
C, "OLEAUT32.dll");
// $ffi->DosDateTimeToVariantTime(wDosDate, wDosTime, pvtime);
// wDosDate : WORD
// wDosTime : WORD
// pvtime : DOUBLE* out
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Oleaut32 extends StdCallLibrary {
    Oleaut32 INSTANCE = Native.load("oleaut32", Oleaut32.class);
    int DosDateTimeToVariantTime(
        short wDosDate,   // WORD
        short wDosTime,   // WORD
        DoubleByReference pvtime   // DOUBLE* out
    );
}

@[Link("oleaut32")]
lib LibOLEAUT32
  fun DosDateTimeToVariantTime = DosDateTimeToVariantTime(
    wDosDate : UInt16,   # WORD
    wDosTime : UInt16,   # WORD
    pvtime : Float64*   # DOUBLE* out
  ) : Int32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef DosDateTimeToVariantTimeNative = Int32 Function(Uint16, Uint16, Pointer<Double>);
typedef DosDateTimeToVariantTimeDart = int Function(int, int, Pointer<Double>);
final DosDateTimeToVariantTime = DynamicLibrary.open('OLEAUT32.dll')
    .lookupFunction<DosDateTimeToVariantTimeNative, DosDateTimeToVariantTimeDart>('DosDateTimeToVariantTime');
// wDosDate : WORD -> Uint16
// wDosTime : WORD -> Uint16
// pvtime : DOUBLE* out -> Pointer<Double>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DosDateTimeToVariantTime(
  wDosDate: Word;   // WORD
  wDosTime: Word;   // WORD
  pvtime: Pointer   // DOUBLE* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'DosDateTimeToVariantTime';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "DosDateTimeToVariantTime"
  c_DosDateTimeToVariantTime :: Word16 -> Word16 -> Ptr CDouble -> IO Int32
-- wDosDate : WORD -> Word16
-- wDosTime : WORD -> Word16
-- pvtime : DOUBLE* out -> Ptr CDouble
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let dosdatetimetovarianttime =
  foreign "DosDateTimeToVariantTime"
    (uint16_t @-> uint16_t @-> (ptr double) @-> returning int32_t)
(* wDosDate : WORD -> uint16_t *)
(* wDosTime : WORD -> uint16_t *)
(* pvtime : DOUBLE* out -> (ptr double) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library oleaut32 (t "OLEAUT32.dll"))
(cffi:use-foreign-library oleaut32)

(cffi:defcfun ("DosDateTimeToVariantTime" dos-date-time-to-variant-time :convention :stdcall) :int32
  (w-dos-date :uint16)   ; WORD
  (w-dos-time :uint16)   ; WORD
  (pvtime :pointer))   ; DOUBLE* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DosDateTimeToVariantTime = Win32::API::More->new('OLEAUT32',
    'int DosDateTimeToVariantTime(WORD wDosDate, WORD wDosTime, LPVOID pvtime)');
# my $ret = $DosDateTimeToVariantTime->Call($wDosDate, $wDosTime, $pvtime);
# wDosDate : WORD -> WORD
# wDosTime : WORD -> WORD
# pvtime : DOUBLE* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。