VarCyMul

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

HRESULT VarCyMul(
    CY cyLeft,
    CY cyRight,
    CY* pcyResult
);

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

' cyLeft : CY
' cyRight : CY
' pcyResult : CY* out
Declare PtrSafe Function VarCyMul Lib "oleaut32" ( _
    ByVal cyLeft As LongPtr, _
    ByVal cyRight As LongPtr, _
    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

VarCyMul = ctypes.windll.oleaut32.VarCyMul
VarCyMul.restype = ctypes.c_int
VarCyMul.argtypes = [
    CY,  # cyLeft : CY
    CY,  # cyRight : CY
    ctypes.c_void_p,  # pcyResult : CY* out
]

require 'fiddle'
require 'fiddle/import'

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

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

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarCyMul(CY cyLeft, CY cyRight, IntPtr pcyResult);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarCyMul' -Namespace Win32 -PassThru
# $api::VarCyMul(cyLeft, cyRight, pcyResult)

#uselib "OLEAUT32.dll"
#func global VarCyMul "VarCyMul" sptr, sptr, sptr
; VarCyMul cyLeft, cyRight, varptr(pcyResult)   ; 戻り値は stat
; cyLeft : CY -> "sptr"
; cyRight : CY -> "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 #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 VarCyMul "VarCyMul" int, int, var
; res = VarCyMul(cyLeft, cyRight, pcyResult)
; cyLeft : CY -> "int"
; cyRight : CY -> "int"
; 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。

; HRESULT VarCyMul(CY cyLeft, CY cyRight, CY* pcyResult)
#uselib "OLEAUT32.dll"
#cfunc global VarCyMul "VarCyMul" int, int, var
; res = VarCyMul(cyLeft, cyRight, pcyResult)
; cyLeft : CY -> "int"
; cyRight : CY -> "int"
; 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")
	procVarCyMul = oleaut32.NewProc("VarCyMul")
)

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

function VarCyMul(
  cyLeft: CY;   // CY
  cyRight: CY;   // CY
  pcyResult: Pointer   // CY* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarCyMul';

result := DllCall("OLEAUT32\VarCyMul"
    , "Ptr", cyLeft   ; CY
    , "Ptr", cyRight   ; CY
    , "Ptr", pcyResult   ; CY* out
    , "Int")   ; return: HRESULT

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