VarDateFromBool

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

HRESULT VarDateFromBool(
    VARIANT_BOOL boolIn,
    DOUBLE* pdateOut
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarDateFromBool(
    boolIn As Short,   ' VARIANT_BOOL
    <Out> ByRef pdateOut As Double   ' DOUBLE* out
) As Integer
End Function

' boolIn : VARIANT_BOOL
' pdateOut : DOUBLE* out
Declare PtrSafe Function VarDateFromBool Lib "oleaut32" ( _
    ByVal boolIn As Integer, _
    ByRef pdateOut 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

VarDateFromBool = ctypes.windll.oleaut32.VarDateFromBool
VarDateFromBool.restype = ctypes.c_int
VarDateFromBool.argtypes = [
    ctypes.c_short,  # boolIn : VARIANT_BOOL
    ctypes.POINTER(ctypes.c_double),  # pdateOut : DOUBLE* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarDateFromBool = Fiddle::Function.new(
  lib['VarDateFromBool'],
  [
    Fiddle::TYPE_SHORT,  # boolIn : VARIANT_BOOL
    Fiddle::TYPE_VOIDP,  # pdateOut : DOUBLE* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarDateFromBool(
        boolIn: i16,  // VARIANT_BOOL
        pdateOut: *mut f64  // DOUBLE* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarDateFromBool(short boolIn, out double pdateOut);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarDateFromBool' -Namespace Win32 -PassThru
# $api::VarDateFromBool(boolIn, pdateOut)

#uselib "OLEAUT32.dll"
#func global VarDateFromBool "VarDateFromBool" sptr, sptr
; VarDateFromBool boolIn, varptr(pdateOut)   ; 戻り値は stat
; boolIn : VARIANT_BOOL -> "sptr"
; pdateOut : 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。

#uselib "OLEAUT32.dll"
#cfunc global VarDateFromBool "VarDateFromBool" int, var
; res = VarDateFromBool(boolIn, pdateOut)
; boolIn : VARIANT_BOOL -> "int"
; pdateOut : DOUBLE* 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 VarDateFromBool(VARIANT_BOOL boolIn, DOUBLE* pdateOut)
#uselib "OLEAUT32.dll"
#cfunc global VarDateFromBool "VarDateFromBool" int, var
; res = VarDateFromBool(boolIn, pdateOut)
; boolIn : VARIANT_BOOL -> "int"
; pdateOut : DOUBLE* 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 (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procVarDateFromBool = oleaut32.NewProc("VarDateFromBool")
)

// boolIn (VARIANT_BOOL), pdateOut (DOUBLE* out)
r1, _, err := procVarDateFromBool.Call(
	uintptr(boolIn),
	uintptr(pdateOut),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function VarDateFromBool(
  boolIn: Smallint;   // VARIANT_BOOL
  pdateOut: Pointer   // DOUBLE* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarDateFromBool';

result := DllCall("OLEAUT32\VarDateFromBool"
    , "Short", boolIn   ; VARIANT_BOOL
    , "Ptr", pdateOut   ; DOUBLE* out
    , "Int")   ; return: HRESULT

●VarDateFromBool(boolIn, pdateOut) = DLL("OLEAUT32.dll", "int VarDateFromBool(int, void*)")
# 呼び出し: VarDateFromBool(boolIn, pdateOut)
# boolIn : VARIANT_BOOL -> "int"
# pdateOut : 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)。