ホーム › NetworkManagement.Dns › DnsFreeCustomServers

DnsFreeCustomServers

関数

カスタムDNSサーバー一覧用に割り当てたメモリを解放する。

DLLDNSAPI.dll呼出規約winapi

シグネチャ

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

void DnsFreeCustomServers(
    DWORD* pcServers,
    DNS_CUSTOM_SERVER** ppServers
);

パラメーター

名前	型	方向
pcServers	DWORD*	inout
ppServers	DNS_CUSTOM_SERVER**	inout

戻り値の型: void

各言語での呼び出し定義

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

void DnsFreeCustomServers(
    DWORD* pcServers,
    DNS_CUSTOM_SERVER** ppServers
);

[DllImport("DNSAPI.dll", ExactSpelling = true)]
static extern void DnsFreeCustomServers(
    ref uint pcServers,   // DWORD* in/out
    IntPtr ppServers   // DNS_CUSTOM_SERVER** in/out
);

<DllImport("DNSAPI.dll", ExactSpelling:=True)>
Public Shared Sub DnsFreeCustomServers(
    ByRef pcServers As UInteger,   ' DWORD* in/out
    ppServers As IntPtr   ' DNS_CUSTOM_SERVER** in/out
)
End Sub

' pcServers : DWORD* in/out
' ppServers : DNS_CUSTOM_SERVER** in/out
Declare PtrSafe Sub DnsFreeCustomServers Lib "dnsapi" ( _
    ByRef pcServers As Long, _
    ByVal ppServers As LongPtr)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

DnsFreeCustomServers = ctypes.windll.dnsapi.DnsFreeCustomServers
DnsFreeCustomServers.restype = None
DnsFreeCustomServers.argtypes = [
    ctypes.POINTER(wintypes.DWORD),  # pcServers : DWORD* in/out
    ctypes.c_void_p,  # ppServers : DNS_CUSTOM_SERVER** in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DNSAPI.dll')
DnsFreeCustomServers = Fiddle::Function.new(
  lib['DnsFreeCustomServers'],
  [
    Fiddle::TYPE_VOIDP,  # pcServers : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # ppServers : DNS_CUSTOM_SERVER** in/out
  ],
  Fiddle::TYPE_VOID)

#[link(name = "dnsapi")]
extern "system" {
    fn DnsFreeCustomServers(
        pcServers: *mut u32,  // DWORD* in/out
        ppServers: *mut *mut DNS_CUSTOM_SERVER  // DNS_CUSTOM_SERVER** in/out
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DNSAPI.dll")]
public static extern void DnsFreeCustomServers(ref uint pcServers, IntPtr ppServers);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DNSAPI_DnsFreeCustomServers' -Namespace Win32 -PassThru
# $api::DnsFreeCustomServers(pcServers, ppServers)

#uselib "DNSAPI.dll"
#func global DnsFreeCustomServers "DnsFreeCustomServers" sptr, sptr
; DnsFreeCustomServers varptr(pcServers), varptr(ppServers)
; pcServers : DWORD* in/out -> "sptr"
; ppServers : DNS_CUSTOM_SERVER** in/out -> "sptr"

出力引数:

#uselib "DNSAPI.dll"
#func global DnsFreeCustomServers "DnsFreeCustomServers" var, var
; DnsFreeCustomServers pcServers, ppServers
; pcServers : DWORD* in/out -> "var"
; ppServers : DNS_CUSTOM_SERVER** 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 "DNSAPI.dll"
#func global DnsFreeCustomServers "DnsFreeCustomServers" sptr, sptr
; DnsFreeCustomServers varptr(pcServers), varptr(ppServers)
; pcServers : DWORD* in/out -> "sptr"
; ppServers : DNS_CUSTOM_SERVER** 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:

; void DnsFreeCustomServers(DWORD* pcServers, DNS_CUSTOM_SERVER** ppServers)
#uselib "DNSAPI.dll"
#func global DnsFreeCustomServers "DnsFreeCustomServers" var, var
; DnsFreeCustomServers pcServers, ppServers
; pcServers : DWORD* in/out -> "var"
; ppServers : DNS_CUSTOM_SERVER** 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。; void DnsFreeCustomServers(DWORD* pcServers, DNS_CUSTOM_SERVER** ppServers)
#uselib "DNSAPI.dll"
#func global DnsFreeCustomServers "DnsFreeCustomServers" intptr, intptr
; DnsFreeCustomServers varptr(pcServers), varptr(ppServers)
; pcServers : DWORD* in/out -> "intptr"
; ppServers : DNS_CUSTOM_SERVER** 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 (
	dnsapi = windows.NewLazySystemDLL("DNSAPI.dll")
	procDnsFreeCustomServers = dnsapi.NewProc("DnsFreeCustomServers")
)

// pcServers (DWORD* in/out), ppServers (DNS_CUSTOM_SERVER** in/out)
r1, _, err := procDnsFreeCustomServers.Call(
	uintptr(pcServers),
	uintptr(ppServers),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure DnsFreeCustomServers(
  pcServers: Pointer;   // DWORD* in/out
  ppServers: Pointer   // DNS_CUSTOM_SERVER** in/out
); stdcall;
  external 'DNSAPI.dll' name 'DnsFreeCustomServers';

result := DllCall("DNSAPI\DnsFreeCustomServers"
    , "Ptr", pcServers   ; DWORD* in/out
    , "Ptr", ppServers   ; DNS_CUSTOM_SERVER** in/out
    , "Int")   ; return: void

●DnsFreeCustomServers(pcServers, ppServers) = DLL("DNSAPI.dll", "int DnsFreeCustomServers(void*, void*)")
# 呼び出し: DnsFreeCustomServers(pcServers, ppServers)
# pcServers : DWORD* in/out -> "void*"
# ppServers : DNS_CUSTOM_SERVER** 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)。