VarUdateFromDate

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

HRESULT VarUdateFromDate(
    DOUBLE dateIn,
    DWORD dwFlags,
    UDATE* pudateOut
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarUdateFromDate(
    dateIn As Double,   ' DOUBLE
    dwFlags As UInteger,   ' DWORD
    pudateOut As IntPtr   ' UDATE* out
) As Integer
End Function

' dateIn : DOUBLE
' dwFlags : DWORD
' pudateOut : UDATE* out
Declare PtrSafe Function VarUdateFromDate Lib "oleaut32" ( _
    ByVal dateIn As Double, _
    ByVal dwFlags As Long, _
    ByVal pudateOut 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

VarUdateFromDate = ctypes.windll.oleaut32.VarUdateFromDate
VarUdateFromDate.restype = ctypes.c_int
VarUdateFromDate.argtypes = [
    ctypes.c_double,  # dateIn : DOUBLE
    wintypes.DWORD,  # dwFlags : DWORD
    ctypes.c_void_p,  # pudateOut : UDATE* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarUdateFromDate = Fiddle::Function.new(
  lib['VarUdateFromDate'],
  [
    Fiddle::TYPE_DOUBLE,  # dateIn : DOUBLE
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    Fiddle::TYPE_VOIDP,  # pudateOut : UDATE* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarUdateFromDate(
        dateIn: f64,  // DOUBLE
        dwFlags: u32,  // DWORD
        pudateOut: *mut UDATE  // UDATE* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarUdateFromDate(double dateIn, uint dwFlags, IntPtr pudateOut);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarUdateFromDate' -Namespace Win32 -PassThru
# $api::VarUdateFromDate(dateIn, dwFlags, pudateOut)

#uselib "OLEAUT32.dll"
#func global VarUdateFromDate "VarUdateFromDate" double, sptr, sptr
; VarUdateFromDate dateIn, dwFlags, varptr(pudateOut)   ; 戻り値は stat
; dateIn : DOUBLE -> "double"
; dwFlags : DWORD -> "sptr"
; pudateOut : UDATE* 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。

#uselib "OLEAUT32.dll"
#cfunc global VarUdateFromDate "VarUdateFromDate" double, int, var
; res = VarUdateFromDate(dateIn, dwFlags, pudateOut)
; dateIn : DOUBLE -> "double"
; dwFlags : DWORD -> "int"
; pudateOut : UDATE* 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。

; HRESULT VarUdateFromDate(DOUBLE dateIn, DWORD dwFlags, UDATE* pudateOut)
#uselib "OLEAUT32.dll"
#cfunc global VarUdateFromDate "VarUdateFromDate" double, int, var
; res = VarUdateFromDate(dateIn, dwFlags, pudateOut)
; dateIn : DOUBLE -> "double"
; dwFlags : DWORD -> "int"
; pudateOut : UDATE* 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 (
	"math"
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procVarUdateFromDate = oleaut32.NewProc("VarUdateFromDate")
)

// dateIn (DOUBLE), dwFlags (DWORD), pudateOut (UDATE* out)
r1, _, err := procVarUdateFromDate.Call(
	uintptr(math.Float64bits(dateIn)),
	uintptr(dwFlags),
	uintptr(pudateOut),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT
// 注意: float/double 引数は proc.Call では XMM レジスタに渡せません。
// windows.SyscallN(proc.Addr(), math.Float64bits(x), ...) もしくは cgo を使用してください。

function VarUdateFromDate(
  dateIn: Double;   // DOUBLE
  dwFlags: DWORD;   // DWORD
  pudateOut: Pointer   // UDATE* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarUdateFromDate';

result := DllCall("OLEAUT32\VarUdateFromDate"
    , "Double", dateIn   ; DOUBLE
    , "UInt", dwFlags   ; DWORD
    , "Ptr", pudateOut   ; UDATE* out
    , "Int")   ; return: HRESULT

●VarUdateFromDate(dateIn, dwFlags, pudateOut) = DLL("OLEAUT32.dll", "int VarUdateFromDate(double, dword, void*)")
# 呼び出し: VarUdateFromDate(dateIn, dwFlags, pudateOut)
# dateIn : DOUBLE -> "double"
# dwFlags : DWORD -> "dword"
# pudateOut : UDATE* 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)。