VarCyMulI8

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

HRESULT VarCyMulI8(
    CY cyLeft,
    LONGLONG lRight,
    CY* pcyResult
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarCyMulI8(
    cyLeft As CY,   ' CY
    lRight As Long,   ' LONGLONG
    pcyResult As IntPtr   ' CY* out
) As Integer
End Function

' cyLeft : CY
' lRight : LONGLONG
' pcyResult : CY* out
Declare PtrSafe Function VarCyMulI8 Lib "oleaut32" ( _
    ByVal cyLeft As LongPtr, _
    ByVal lRight As LongLong, _
    ByVal pcyResult 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

VarCyMulI8 = ctypes.windll.oleaut32.VarCyMulI8
VarCyMulI8.restype = ctypes.c_int
VarCyMulI8.argtypes = [
    CY,  # cyLeft : CY
    ctypes.c_longlong,  # lRight : LONGLONG
    ctypes.c_void_p,  # pcyResult : CY* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarCyMulI8 = Fiddle::Function.new(
  lib['VarCyMulI8'],
  [
    Fiddle::TYPE_VOIDP,  # cyLeft : CY
    Fiddle::TYPE_LONG_LONG,  # lRight : LONGLONG
    Fiddle::TYPE_VOIDP,  # pcyResult : CY* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarCyMulI8(
        cyLeft: CY,  // CY
        lRight: i64,  // LONGLONG
        pcyResult: *mut CY  // CY* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarCyMulI8(CY cyLeft, long lRight, IntPtr pcyResult);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarCyMulI8' -Namespace Win32 -PassThru
# $api::VarCyMulI8(cyLeft, lRight, pcyResult)

#uselib "OLEAUT32.dll"
#func global VarCyMulI8 "VarCyMulI8" sptr, sptr, sptr
; VarCyMulI8 cyLeft, lRight, varptr(pcyResult)   ; 戻り値は stat
; cyLeft : CY -> "sptr"
; lRight : LONGLONG -> "sptr"
; pcyResult : CY* out -> "sptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 VarCyMulI8 "VarCyMulI8" int, int64, var
; res = VarCyMulI8(cyLeft, lRight, pcyResult)
; cyLeft : CY -> "int"
; lRight : LONGLONG -> "int64"
; pcyResult : CY* out -> "var"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 VarCyMulI8(CY cyLeft, LONGLONG lRight, CY* pcyResult)
#uselib "OLEAUT32.dll"
#cfunc global VarCyMulI8 "VarCyMulI8" int, int64, var
; res = VarCyMulI8(cyLeft, lRight, pcyResult)
; cyLeft : CY -> "int"
; lRight : LONGLONG -> "int64"
; pcyResult : CY* out -> "var"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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")
	procVarCyMulI8 = oleaut32.NewProc("VarCyMulI8")
)

// cyLeft (CY), lRight (LONGLONG), pcyResult (CY* out)
r1, _, err := procVarCyMulI8.Call(
	uintptr(cyLeft),
	uintptr(lRight),
	uintptr(pcyResult),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function VarCyMulI8(
  cyLeft: CY;   // CY
  lRight: Int64;   // LONGLONG
  pcyResult: Pointer   // CY* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarCyMulI8';

result := DllCall("OLEAUT32\VarCyMulI8"
    , "Ptr", cyLeft   ; CY
    , "Int64", lRight   ; LONGLONG
    , "Ptr", pcyResult   ; CY* out
    , "Int")   ; return: HRESULT

●VarCyMulI8(cyLeft, lRight, pcyResult) = DLL("OLEAUT32.dll", "int VarCyMulI8(void*, int64, void*)")
# 呼び出し: VarCyMulI8(cyLeft, lRight, pcyResult)
# cyLeft : CY -> "void*"
# lRight : LONGLONG -> "int64"
# pcyResult : CY* 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)。