MFllMulDiv

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

LONGLONG MFllMulDiv(
    LONGLONG a,
    LONGLONG b,
    LONGLONG c,
    LONGLONG d
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFllMulDiv(
    a As Long,   ' LONGLONG
    b As Long,   ' LONGLONG
    c As Long,   ' LONGLONG
    d As Long   ' LONGLONG
) As Long
End Function

' a : LONGLONG
' b : LONGLONG
' c : LONGLONG
' d : LONGLONG
Declare PtrSafe Function MFllMulDiv Lib "mfplat" ( _
    ByVal a As LongLong, _
    ByVal b As LongLong, _
    ByVal c As LongLong, _
    ByVal d As LongLong) As LongLong
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

MFllMulDiv = ctypes.windll.mfplat.MFllMulDiv
MFllMulDiv.restype = ctypes.c_longlong
MFllMulDiv.argtypes = [
    ctypes.c_longlong,  # a : LONGLONG
    ctypes.c_longlong,  # b : LONGLONG
    ctypes.c_longlong,  # c : LONGLONG
    ctypes.c_longlong,  # d : LONGLONG
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFllMulDiv = Fiddle::Function.new(
  lib['MFllMulDiv'],
  [
    Fiddle::TYPE_LONG_LONG,  # a : LONGLONG
    Fiddle::TYPE_LONG_LONG,  # b : LONGLONG
    Fiddle::TYPE_LONG_LONG,  # c : LONGLONG
    Fiddle::TYPE_LONG_LONG,  # d : LONGLONG
  ],
  Fiddle::TYPE_LONG_LONG)

#[link(name = "mfplat")]
extern "system" {
    fn MFllMulDiv(
        a: i64,  // LONGLONG
        b: i64,  // LONGLONG
        c: i64,  // LONGLONG
        d: i64  // LONGLONG
    ) -> i64;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern long MFllMulDiv(long a, long b, long c, long d);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFllMulDiv' -Namespace Win32 -PassThru
# $api::MFllMulDiv(a, b, c, d)

#uselib "MFPlat.dll"
#func global MFllMulDiv "MFllMulDiv" sptr, sptr, sptr, sptr
; MFllMulDiv a, b, c, d   ; 戻り値は stat
; a : LONGLONG -> "sptr"
; b : LONGLONG -> "sptr"
; c : LONGLONG -> "sptr"
; d : LONGLONG -> "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 "MFPlat.dll"
#cfunc global MFllMulDiv "MFllMulDiv" int64, int64, int64, int64
; res = MFllMulDiv(a, b, c, d)
; a : LONGLONG -> "int64"
; b : LONGLONG -> "int64"
; c : LONGLONG -> "int64"
; d : LONGLONG -> "int64"
; ※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)。

; LONGLONG MFllMulDiv(LONGLONG a, LONGLONG b, LONGLONG c, LONGLONG d)
#uselib "MFPlat.dll"
#cfunc global MFllMulDiv "MFllMulDiv" int64, int64, int64, int64
; res = MFllMulDiv(a, b, c, d)
; a : LONGLONG -> "int64"
; b : LONGLONG -> "int64"
; c : LONGLONG -> "int64"
; d : LONGLONG -> "int64"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFllMulDiv = mfplat.NewProc("MFllMulDiv")
)

// a (LONGLONG), b (LONGLONG), c (LONGLONG), d (LONGLONG)
r1, _, err := procMFllMulDiv.Call(
	uintptr(a),
	uintptr(b),
	uintptr(c),
	uintptr(d),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // LONGLONG

function MFllMulDiv(
  a: Int64;   // LONGLONG
  b: Int64;   // LONGLONG
  c: Int64;   // LONGLONG
  d: Int64   // LONGLONG
): Int64; stdcall;
  external 'MFPlat.dll' name 'MFllMulDiv';

result := DllCall("MFPlat\MFllMulDiv"
    , "Int64", a   ; LONGLONG
    , "Int64", b   ; LONGLONG
    , "Int64", c   ; LONGLONG
    , "Int64", d   ; LONGLONG
    , "Int64")   ; return: LONGLONG

●MFllMulDiv(a, b, c, d) = DLL("MFPlat.dll", "int64 MFllMulDiv(int64, int64, int64, int64)")
# 呼び出し: MFllMulDiv(a, b, c, d)
# a : LONGLONG -> "int64"
# b : LONGLONG -> "int64"
# c : LONGLONG -> "int64"
# d : LONGLONG -> "int64"
# 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)。