LocalHandle

関数

ポインタから対応するローカルメモリハンドルを取得する。

DLLKERNEL32.dll呼出規約winapiSetLastErrorあり対応OSWindows XP 以降

シグネチャ

// KERNEL32.dll
#include <windows.h>

HLOCAL LocalHandle(
    const void* pMem
);

パラメーター

名前	型	方向
pMem	void*	in

戻り値の型: HLOCAL

各言語での呼び出し定義

// KERNEL32.dll
#include <windows.h>

HLOCAL LocalHandle(
    const void* pMem
);

[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern IntPtr LocalHandle(
    IntPtr pMem   // void*
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function LocalHandle(
    pMem As IntPtr   ' void*
) As IntPtr
End Function

' pMem : void*
Declare PtrSafe Function LocalHandle Lib "kernel32" ( _
    ByVal pMem As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

LocalHandle = ctypes.windll.kernel32.LocalHandle
LocalHandle.restype = ctypes.c_void_p
LocalHandle.argtypes = [
    ctypes.POINTER(None),  # pMem : void*
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
LocalHandle = Fiddle::Function.new(
  lib['LocalHandle'],
  [
    Fiddle::TYPE_VOIDP,  # pMem : void*
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "kernel32")]
extern "system" {
    fn LocalHandle(
        pMem: *const ()  // void*
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern IntPtr LocalHandle(IntPtr pMem);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_LocalHandle' -Namespace Win32 -PassThru
# $api::LocalHandle(pMem)

#uselib "KERNEL32.dll"
#func global LocalHandle "LocalHandle" sptr
; LocalHandle pMem   ; 戻り値は stat
; pMem : void* -> "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 "KERNEL32.dll"
#cfunc global LocalHandle "LocalHandle" sptr
; res = LocalHandle(pMem)
; pMem : void* -> "sptr"

; HLOCAL LocalHandle(void* pMem)
#uselib "KERNEL32.dll"
#cfunc global LocalHandle "LocalHandle" intptr
; res = LocalHandle(pMem)
; pMem : void* -> "intptr"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procLocalHandle = kernel32.NewProc("LocalHandle")
)

// pMem (void*)
r1, _, err := procLocalHandle.Call(
	uintptr(pMem),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HLOCAL

function LocalHandle(
  pMem: Pointer   // void*
): THandle; stdcall;
  external 'KERNEL32.dll' name 'LocalHandle';

result := DllCall("KERNEL32\LocalHandle"
    , "Ptr", pMem   ; void*
    , "Ptr")   ; return: HLOCAL

●LocalHandle(pMem) = DLL("KERNEL32.dll", "void* LocalHandle(void*)")
# 呼び出し: LocalHandle(pMem)
# pMem : void* -> "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)。