VariantClear

関数

VARIANTの内容をクリアし、関連リソースを解放する。

DLLOLEAUT32.dll呼出規約winapi

シグネチャ

// OLEAUT32.dll
#include <windows.h>

HRESULT VariantClear(
    VARIANT* pvarg
);

パラメーター

名前	型	方向
pvarg	VARIANT*	inout

戻り値の型: HRESULT

各言語での呼び出し定義

// OLEAUT32.dll
#include <windows.h>

HRESULT VariantClear(
    VARIANT* pvarg
);

[DllImport("OLEAUT32.dll", ExactSpelling = true)]
static extern int VariantClear(
    IntPtr pvarg   // VARIANT* in/out
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VariantClear(
    pvarg As IntPtr   ' VARIANT* in/out
) As Integer
End Function

' pvarg : VARIANT* in/out
Declare PtrSafe Function VariantClear Lib "oleaut32" ( _
    ByVal pvarg 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

VariantClear = ctypes.windll.oleaut32.VariantClear
VariantClear.restype = ctypes.c_int
VariantClear.argtypes = [
    ctypes.c_void_p,  # pvarg : VARIANT* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VariantClear = Fiddle::Function.new(
  lib['VariantClear'],
  [
    Fiddle::TYPE_VOIDP,  # pvarg : VARIANT* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VariantClear(
        pvarg: *mut VARIANT  // VARIANT* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VariantClear(IntPtr pvarg);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VariantClear' -Namespace Win32 -PassThru
# $api::VariantClear(pvarg)

#uselib "OLEAUT32.dll"
#func global VariantClear "VariantClear" sptr
; VariantClear varptr(pvarg)   ; 戻り値は stat
; pvarg : VARIANT* 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 "OLEAUT32.dll"
#cfunc global VariantClear "VariantClear" var
; res = VariantClear(pvarg)
; pvarg : VARIANT* 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 "OLEAUT32.dll"
#cfunc global VariantClear "VariantClear" sptr
; res = VariantClear(varptr(pvarg))
; pvarg : VARIANT* 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 VariantClear(VARIANT* pvarg)
#uselib "OLEAUT32.dll"
#cfunc global VariantClear "VariantClear" var
; res = VariantClear(pvarg)
; pvarg : VARIANT* 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 VariantClear(VARIANT* pvarg)
#uselib "OLEAUT32.dll"
#cfunc global VariantClear "VariantClear" intptr
; res = VariantClear(varptr(pvarg))
; pvarg : VARIANT* 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 (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procVariantClear = oleaut32.NewProc("VariantClear")
)

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

function VariantClear(
  pvarg: Pointer   // VARIANT* in/out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VariantClear';

result := DllCall("OLEAUT32\VariantClear"
    , "Ptr", pvarg   ; VARIANT* in/out
    , "Int")   ; return: HRESULT

●VariantClear(pvarg) = DLL("OLEAUT32.dll", "int VariantClear(void*)")
# 呼び出し: VariantClear(pvarg)
# pvarg : VARIANT* 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)。