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PropVariantClear

関数

PROPVARIANTを初期化し保持するリソースを解放する。

DLLOLE32.dll呼出規約winapi対応OSWindows 2000 以降

シグネチャ

// OLE32.dll
#include <windows.h>

HRESULT PropVariantClear(
    PROPVARIANT* pvar
);

パラメーター

名前	型	方向
pvar	PROPVARIANT*	inout

戻り値の型: HRESULT

各言語での呼び出し定義

// OLE32.dll
#include <windows.h>

HRESULT PropVariantClear(
    PROPVARIANT* pvar
);

[DllImport("OLE32.dll", ExactSpelling = true)]
static extern int PropVariantClear(
    IntPtr pvar   // PROPVARIANT* in/out
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function PropVariantClear(
    pvar As IntPtr   ' PROPVARIANT* in/out
) As Integer
End Function

' pvar : PROPVARIANT* in/out
Declare PtrSafe Function PropVariantClear Lib "ole32" ( _
    ByVal pvar As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

PropVariantClear = ctypes.windll.ole32.PropVariantClear
PropVariantClear.restype = ctypes.c_int
PropVariantClear.argtypes = [
    ctypes.c_void_p,  # pvar : PROPVARIANT* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
PropVariantClear = Fiddle::Function.new(
  lib['PropVariantClear'],
  [
    Fiddle::TYPE_VOIDP,  # pvar : PROPVARIANT* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn PropVariantClear(
        pvar: *mut PROPVARIANT  // PROPVARIANT* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLE32.dll")]
public static extern int PropVariantClear(IntPtr pvar);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_PropVariantClear' -Namespace Win32 -PassThru
# $api::PropVariantClear(pvar)

#uselib "OLE32.dll"
#func global PropVariantClear "PropVariantClear" sptr
; PropVariantClear varptr(pvar)   ; 戻り値は stat
; pvar : PROPVARIANT* in/out -> "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。

出力引数:

#uselib "OLE32.dll"
#cfunc global PropVariantClear "PropVariantClear" var
; res = PropVariantClear(pvar)
; pvar : PROPVARIANT* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。#uselib "OLE32.dll"
#cfunc global PropVariantClear "PropVariantClear" sptr
; res = PropVariantClear(varptr(pvar))
; pvar : PROPVARIANT* in/out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; HRESULT PropVariantClear(PROPVARIANT* pvar)
#uselib "OLE32.dll"
#cfunc global PropVariantClear "PropVariantClear" var
; res = PropVariantClear(pvar)
; pvar : PROPVARIANT* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。; HRESULT PropVariantClear(PROPVARIANT* pvar)
#uselib "OLE32.dll"
#cfunc global PropVariantClear "PropVariantClear" intptr
; res = PropVariantClear(varptr(pvar))
; pvar : PROPVARIANT* in/out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procPropVariantClear = ole32.NewProc("PropVariantClear")
)

// pvar (PROPVARIANT* in/out)
r1, _, err := procPropVariantClear.Call(
	uintptr(pvar),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function PropVariantClear(
  pvar: Pointer   // PROPVARIANT* in/out
): Integer; stdcall;
  external 'OLE32.dll' name 'PropVariantClear';

result := DllCall("OLE32\PropVariantClear"
    , "Ptr", pvar   ; PROPVARIANT* in/out
    , "Int")   ; return: HRESULT

●PropVariantClear(pvar) = DLL("OLE32.dll", "int PropVariantClear(void*)")
# 呼び出し: PropVariantClear(pvar)
# pvar : PROPVARIANT* in/out -> "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)。