SysReleaseString

関数

BSTRの参照カウントを減らし不要なら解放する。

DLLOLEAUT32.dll呼出規約winapi対応OSWindows XP 以降

シグネチャ

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

void SysReleaseString(
    LPWSTR bstrString
);

パラメーター

名前	型	方向
bstrString	LPWSTR	in

戻り値の型: void

各言語での呼び出し定義

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

void SysReleaseString(
    LPWSTR bstrString
);

[DllImport("OLEAUT32.dll", ExactSpelling = true)]
static extern void SysReleaseString(
    [MarshalAs(UnmanagedType.LPWStr)] string bstrString   // LPWSTR
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Sub SysReleaseString(
    <MarshalAs(UnmanagedType.LPWStr)> bstrString As String   ' LPWSTR
)
End Sub

' bstrString : LPWSTR
Declare PtrSafe Sub SysReleaseString Lib "oleaut32" ( _
    ByVal bstrString As LongPtr)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SysReleaseString = ctypes.windll.oleaut32.SysReleaseString
SysReleaseString.restype = None
SysReleaseString.argtypes = [
    wintypes.LPCWSTR,  # bstrString : LPWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
SysReleaseString = Fiddle::Function.new(
  lib['SysReleaseString'],
  [
    Fiddle::TYPE_VOIDP,  # bstrString : LPWSTR
  ],
  Fiddle::TYPE_VOID)

#[link(name = "oleaut32")]
extern "system" {
    fn SysReleaseString(
        bstrString: *mut u16  // LPWSTR
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern void SysReleaseString([MarshalAs(UnmanagedType.LPWStr)] string bstrString);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_SysReleaseString' -Namespace Win32 -PassThru
# $api::SysReleaseString(bstrString)

#uselib "OLEAUT32.dll"
#func global SysReleaseString "SysReleaseString" sptr
; SysReleaseString bstrString
; bstrString : LPWSTR -> "sptr"

#uselib "OLEAUT32.dll"
#func global SysReleaseString "SysReleaseString" wstr
; SysReleaseString bstrString
; bstrString : LPWSTR -> "wstr"

; void SysReleaseString(LPWSTR bstrString)
#uselib "OLEAUT32.dll"
#func global SysReleaseString "SysReleaseString" wstr
; SysReleaseString bstrString
; bstrString : LPWSTR -> "wstr"

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

var (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procSysReleaseString = oleaut32.NewProc("SysReleaseString")
)

// bstrString (LPWSTR)
r1, _, err := procSysReleaseString.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(bstrString))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure SysReleaseString(
  bstrString: PWideChar   // LPWSTR
); stdcall;
  external 'OLEAUT32.dll' name 'SysReleaseString';

result := DllCall("OLEAUT32\SysReleaseString"
    , "WStr", bstrString   ; LPWSTR
    , "Int")   ; return: void

●SysReleaseString(bstrString) = DLL("OLEAUT32.dll", "int SysReleaseString(char*)")
# 呼び出し: SysReleaseString(bstrString)
# bstrString : LPWSTR -> "char*"
# 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)。