VarDecFromUI8

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

HRESULT VarDecFromUI8(
    ULONGLONG ui64In,
    DECIMAL* pdecOut
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarDecFromUI8(
    ui64In As ULong,   ' ULONGLONG
    pdecOut As IntPtr   ' DECIMAL* out
) As Integer
End Function

' ui64In : ULONGLONG
' pdecOut : DECIMAL* out
Declare PtrSafe Function VarDecFromUI8 Lib "oleaut32" ( _
    ByVal ui64In As LongLong, _
    ByVal pdecOut 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

VarDecFromUI8 = ctypes.windll.oleaut32.VarDecFromUI8
VarDecFromUI8.restype = ctypes.c_int
VarDecFromUI8.argtypes = [
    ctypes.c_ulonglong,  # ui64In : ULONGLONG
    ctypes.c_void_p,  # pdecOut : DECIMAL* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarDecFromUI8 = Fiddle::Function.new(
  lib['VarDecFromUI8'],
  [
    -Fiddle::TYPE_LONG_LONG,  # ui64In : ULONGLONG
    Fiddle::TYPE_VOIDP,  # pdecOut : DECIMAL* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarDecFromUI8(
        ui64In: u64,  // ULONGLONG
        pdecOut: *mut DECIMAL  // DECIMAL* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarDecFromUI8(ulong ui64In, IntPtr pdecOut);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarDecFromUI8' -Namespace Win32 -PassThru
# $api::VarDecFromUI8(ui64In, pdecOut)

#uselib "OLEAUT32.dll"
#func global VarDecFromUI8 "VarDecFromUI8" sptr, sptr
; VarDecFromUI8 ui64In, varptr(pdecOut)   ; 戻り値は stat
; ui64In : ULONGLONG -> "sptr"
; pdecOut : DECIMAL* out -> "sptr"
; ※HSP3.7は int64 引数(64bit値渡し)に非対応です。
; ※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 VarDecFromUI8 "VarDecFromUI8" int64, var
; res = VarDecFromUI8(ui64In, pdecOut)
; ui64In : ULONGLONG -> "int64"
; pdecOut : DECIMAL* 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。
; ※int64 引数の DLL 値渡しは x64 ランタイム(hsp3_64)のみ対応(x86 は未対応)。

; HRESULT VarDecFromUI8(ULONGLONG ui64In, DECIMAL* pdecOut)
#uselib "OLEAUT32.dll"
#cfunc global VarDecFromUI8 "VarDecFromUI8" int64, var
; res = VarDecFromUI8(ui64In, pdecOut)
; ui64In : ULONGLONG -> "int64"
; pdecOut : DECIMAL* 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")
	procVarDecFromUI8 = oleaut32.NewProc("VarDecFromUI8")
)

// ui64In (ULONGLONG), pdecOut (DECIMAL* out)
r1, _, err := procVarDecFromUI8.Call(
	uintptr(ui64In),
	uintptr(pdecOut),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function VarDecFromUI8(
  ui64In: UInt64;   // ULONGLONG
  pdecOut: Pointer   // DECIMAL* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarDecFromUI8';

result := DllCall("OLEAUT32\VarDecFromUI8"
    , "Int64", ui64In   ; ULONGLONG
    , "Ptr", pdecOut   ; DECIMAL* out
    , "Int")   ; return: HRESULT

●VarDecFromUI8(ui64In, pdecOut) = DLL("OLEAUT32.dll", "int VarDecFromUI8(qword, void*)")
# 呼び出し: VarDecFromUI8(ui64In, pdecOut)
# ui64In : ULONGLONG -> "qword"
# pdecOut : DECIMAL* 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)。