IUnknown_Set

関数

保持中のインターフェイスポインタを安全に差し替える。

DLLSHLWAPI.dll呼出規約winapi対応OSWindows 2000 以降

シグネチャ

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

void IUnknown_Set(
    IUnknown** ppunk,
    IUnknown* punk   // optional
);

パラメーター

名前	型	方向
ppunk	IUnknown**	inout
punk	IUnknown*	inoptional

戻り値の型: void

各言語での呼び出し定義

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

void IUnknown_Set(
    IUnknown** ppunk,
    IUnknown* punk   // optional
);

[DllImport("SHLWAPI.dll", ExactSpelling = true)]
static extern void IUnknown_Set(
    IntPtr ppunk,   // IUnknown** in/out
    IntPtr punk   // IUnknown* optional
);

<DllImport("SHLWAPI.dll", ExactSpelling:=True)>
Public Shared Sub IUnknown_Set(
    ppunk As IntPtr,   ' IUnknown** in/out
    punk As IntPtr   ' IUnknown* optional
)
End Sub

' ppunk : IUnknown** in/out
' punk : IUnknown* optional
Declare PtrSafe Sub IUnknown_Set Lib "shlwapi" ( _
    ByVal ppunk As LongPtr, _
    ByVal punk As LongPtr)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

IUnknown_Set = ctypes.windll.shlwapi.IUnknown_Set
IUnknown_Set.restype = None
IUnknown_Set.argtypes = [
    ctypes.c_void_p,  # ppunk : IUnknown** in/out
    ctypes.c_void_p,  # punk : IUnknown* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
IUnknown_Set = Fiddle::Function.new(
  lib['IUnknown_Set'],
  [
    Fiddle::TYPE_VOIDP,  # ppunk : IUnknown** in/out
    Fiddle::TYPE_VOIDP,  # punk : IUnknown* optional
  ],
  Fiddle::TYPE_VOID)

#[link(name = "shlwapi")]
extern "system" {
    fn IUnknown_Set(
        ppunk: *mut *mut core::ffi::c_void,  // IUnknown** in/out
        punk: *mut core::ffi::c_void  // IUnknown* optional
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll")]
public static extern void IUnknown_Set(IntPtr ppunk, IntPtr punk);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_IUnknown_Set' -Namespace Win32 -PassThru
# $api::IUnknown_Set(ppunk, punk)

#uselib "SHLWAPI.dll"
#func global IUnknown_Set "IUnknown_Set" sptr, sptr
; IUnknown_Set ppunk, punk
; ppunk : IUnknown** in/out -> "sptr"
; punk : IUnknown* optional -> "sptr"

#uselib "SHLWAPI.dll"
#func global IUnknown_Set "IUnknown_Set" sptr, sptr
; IUnknown_Set ppunk, punk
; ppunk : IUnknown** in/out -> "sptr"
; punk : IUnknown* optional -> "sptr"

; void IUnknown_Set(IUnknown** ppunk, IUnknown* punk)
#uselib "SHLWAPI.dll"
#func global IUnknown_Set "IUnknown_Set" intptr, intptr
; IUnknown_Set ppunk, punk
; ppunk : IUnknown** in/out -> "intptr"
; punk : IUnknown* optional -> "intptr"

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

var (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procIUnknown_Set = shlwapi.NewProc("IUnknown_Set")
)

// ppunk (IUnknown** in/out), punk (IUnknown* optional)
r1, _, err := procIUnknown_Set.Call(
	uintptr(ppunk),
	uintptr(punk),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure IUnknown_Set(
  ppunk: Pointer;   // IUnknown** in/out
  punk: Pointer   // IUnknown* optional
); stdcall;
  external 'SHLWAPI.dll' name 'IUnknown_Set';

result := DllCall("SHLWAPI\IUnknown_Set"
    , "Ptr", ppunk   ; IUnknown** in/out
    , "Ptr", punk   ; IUnknown* optional
    , "Int")   ; return: void

●IUnknown_Set(ppunk, punk) = DLL("SHLWAPI.dll", "int IUnknown_Set(void*, void*)")
# 呼び出し: IUnknown_Set(ppunk, punk)
# ppunk : IUnknown** in/out -> "void*"
# punk : IUnknown* optional -> "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)。