VarUI2FromDate

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

HRESULT VarUI2FromDate(
    DOUBLE dateIn,
    WORD* puiOut
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarUI2FromDate(
    dateIn As Double,   ' DOUBLE
    <Out> ByRef puiOut As UShort   ' WORD* out
) As Integer
End Function

' dateIn : DOUBLE
' puiOut : WORD* out
Declare PtrSafe Function VarUI2FromDate Lib "oleaut32" ( _
    ByVal dateIn As Double, _
    ByRef puiOut As Integer) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

VarUI2FromDate = ctypes.windll.oleaut32.VarUI2FromDate
VarUI2FromDate.restype = ctypes.c_int
VarUI2FromDate.argtypes = [
    ctypes.c_double,  # dateIn : DOUBLE
    ctypes.POINTER(ctypes.c_ushort),  # puiOut : WORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarUI2FromDate = Fiddle::Function.new(
  lib['VarUI2FromDate'],
  [
    Fiddle::TYPE_DOUBLE,  # dateIn : DOUBLE
    Fiddle::TYPE_VOIDP,  # puiOut : WORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarUI2FromDate(
        dateIn: f64,  // DOUBLE
        puiOut: *mut u16  // WORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarUI2FromDate(double dateIn, out ushort puiOut);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarUI2FromDate' -Namespace Win32 -PassThru
# $api::VarUI2FromDate(dateIn, puiOut)

#uselib "OLEAUT32.dll"
#func global VarUI2FromDate "VarUI2FromDate" double, sptr
; VarUI2FromDate dateIn, varptr(puiOut)   ; 戻り値は stat
; dateIn : DOUBLE -> "double"
; puiOut : WORD* 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 VarUI2FromDate "VarUI2FromDate" double, var
; res = VarUI2FromDate(dateIn, puiOut)
; dateIn : DOUBLE -> "double"
; puiOut : WORD* 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 VarUI2FromDate(DOUBLE dateIn, WORD* puiOut)
#uselib "OLEAUT32.dll"
#cfunc global VarUI2FromDate "VarUI2FromDate" double, var
; res = VarUI2FromDate(dateIn, puiOut)
; dateIn : DOUBLE -> "double"
; puiOut : WORD* 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")
	procVarUI2FromDate = oleaut32.NewProc("VarUI2FromDate")
)

// dateIn (DOUBLE), puiOut (WORD* out)
r1, _, err := procVarUI2FromDate.Call(
	uintptr(math.Float64bits(dateIn)),
	uintptr(puiOut),
)
_ = 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 VarUI2FromDate(
  dateIn: Double;   // DOUBLE
  puiOut: Pointer   // WORD* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarUI2FromDate';

result := DllCall("OLEAUT32\VarUI2FromDate"
    , "Double", dateIn   ; DOUBLE
    , "Ptr", puiOut   ; WORD* out
    , "Int")   ; return: HRESULT

●VarUI2FromDate(dateIn, puiOut) = DLL("OLEAUT32.dll", "int VarUI2FromDate(double, void*)")
# 呼び出し: VarUI2FromDate(dateIn, puiOut)
# dateIn : DOUBLE -> "double"
# puiOut : WORD* 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)。