FtMulDwDw

// MAPI32.dll
#include <windows.h>

FILETIME FtMulDwDw(
    DWORD ftMultiplicand,
    DWORD ftMultiplier
);

<DllImport("MAPI32.dll", ExactSpelling:=True)>
Public Shared Function FtMulDwDw(
    ftMultiplicand As UInteger,   ' DWORD
    ftMultiplier As UInteger   ' DWORD
) As FILETIME
End Function

' ftMultiplicand : DWORD
' ftMultiplier : DWORD
Declare PtrSafe Function FtMulDwDw Lib "mapi32" ( _
    ByVal ftMultiplicand As Long, _
    ByVal ftMultiplier As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

FtMulDwDw = ctypes.windll.mapi32.FtMulDwDw
FtMulDwDw.restype = ctypes.c_void_p
FtMulDwDw.argtypes = [
    wintypes.DWORD,  # ftMultiplicand : DWORD
    wintypes.DWORD,  # ftMultiplier : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MAPI32.dll')
FtMulDwDw = Fiddle::Function.new(
  lib['FtMulDwDw'],
  [
    -Fiddle::TYPE_INT,  # ftMultiplicand : DWORD
    -Fiddle::TYPE_INT,  # ftMultiplier : DWORD
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "mapi32")]
extern "system" {
    fn FtMulDwDw(
        ftMultiplicand: u32,  // DWORD
        ftMultiplier: u32  // DWORD
    ) -> FILETIME;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MAPI32.dll")]
public static extern FILETIME FtMulDwDw(uint ftMultiplicand, uint ftMultiplier);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MAPI32_FtMulDwDw' -Namespace Win32 -PassThru
# $api::FtMulDwDw(ftMultiplicand, ftMultiplier)

#uselib "MAPI32.dll"
#func global FtMulDwDw "FtMulDwDw" sptr, sptr
; FtMulDwDw ftMultiplicand, ftMultiplier   ; 戻り値は stat
; ftMultiplicand : DWORD -> "sptr"
; ftMultiplier : DWORD -> "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 "MAPI32.dll"
#cfunc global FtMulDwDw "FtMulDwDw" int, int
; res = FtMulDwDw(ftMultiplicand, ftMultiplier)
; ftMultiplicand : DWORD -> "int"
; ftMultiplier : DWORD -> "int"

; FILETIME FtMulDwDw(DWORD ftMultiplicand, DWORD ftMultiplier)
#uselib "MAPI32.dll"
#cfunc global FtMulDwDw "FtMulDwDw" int, int
; res = FtMulDwDw(ftMultiplicand, ftMultiplier)
; ftMultiplicand : DWORD -> "int"
; ftMultiplier : DWORD -> "int"

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

var (
	mapi32 = windows.NewLazySystemDLL("MAPI32.dll")
	procFtMulDwDw = mapi32.NewProc("FtMulDwDw")
)

// ftMultiplicand (DWORD), ftMultiplier (DWORD)
r1, _, err := procFtMulDwDw.Call(
	uintptr(ftMultiplicand),
	uintptr(ftMultiplier),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // FILETIME

function FtMulDwDw(
  ftMultiplicand: DWORD;   // DWORD
  ftMultiplier: DWORD   // DWORD
): FILETIME; stdcall;
  external 'MAPI32.dll' name 'FtMulDwDw';

result := DllCall("MAPI32\FtMulDwDw"
    , "UInt", ftMultiplicand   ; DWORD
    , "UInt", ftMultiplier   ; DWORD
    , "Ptr")   ; return: FILETIME

●FtMulDwDw(ftMultiplicand, ftMultiplier) = DLL("MAPI32.dll", "void* FtMulDwDw(dword, dword)")
# 呼び出し: FtMulDwDw(ftMultiplicand, ftMultiplier)
# ftMultiplicand : DWORD -> "dword"
# ftMultiplier : DWORD -> "dword"
# 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)。