MAPIGetDefaultMalloc

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

IMalloc* MAPIGetDefaultMalloc(void);

<DllImport("MAPI32.dll", ExactSpelling:=True)>
Public Shared Function MAPIGetDefaultMalloc() As IntPtr
End Function

Declare PtrSafe Function MAPIGetDefaultMalloc Lib "mapi32" () As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

MAPIGetDefaultMalloc = ctypes.windll.mapi32.MAPIGetDefaultMalloc
MAPIGetDefaultMalloc.restype = ctypes.c_void_p
MAPIGetDefaultMalloc.argtypes = []

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MAPI32.dll')
MAPIGetDefaultMalloc = Fiddle::Function.new(
  lib['MAPIGetDefaultMalloc'],
  [],
  Fiddle::TYPE_VOIDP)

#[link(name = "mapi32")]
extern "system" {
    fn MAPIGetDefaultMalloc() -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MAPI32.dll")]
public static extern IntPtr MAPIGetDefaultMalloc();
"@
$api = Add-Type -MemberDefinition $sig -Name 'MAPI32_MAPIGetDefaultMalloc' -Namespace Win32 -PassThru
# $api::MAPIGetDefaultMalloc()

#uselib "MAPI32.dll"
#func global MAPIGetDefaultMalloc "MAPIGetDefaultMalloc"
; MAPIGetDefaultMalloc   ; 戻り値は stat
; ※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 MAPIGetDefaultMalloc "MAPIGetDefaultMalloc"
; res = MAPIGetDefaultMalloc()

; IMalloc* MAPIGetDefaultMalloc()
#uselib "MAPI32.dll"
#cfunc global MAPIGetDefaultMalloc "MAPIGetDefaultMalloc"
; res = MAPIGetDefaultMalloc()

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

var (
	mapi32 = windows.NewLazySystemDLL("MAPI32.dll")
	procMAPIGetDefaultMalloc = mapi32.NewProc("MAPIGetDefaultMalloc")
)

r1, _, err := procMAPIGetDefaultMalloc.Call()
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // IMalloc*

function MAPIGetDefaultMalloc: Pointer; stdcall;
  external 'MAPI32.dll' name 'MAPIGetDefaultMalloc';

result := DllCall("MAPI32\MAPIGetDefaultMalloc", "Ptr")

●MAPIGetDefaultMalloc() = DLL("MAPI32.dll", "void* MAPIGetDefaultMalloc()")
# 呼び出し: MAPIGetDefaultMalloc()
# 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)。