Dhcpv6ReleasePrefix

// dhcpcsvc6.dll
#include <windows.h>

DWORD Dhcpv6ReleasePrefix(
    LPWSTR adapterName,
    DHCPV6CAPI_CLASSID* classId,
    DHCPV6PrefixLeaseInformation* leaseInfo
);

<DllImport("dhcpcsvc6.dll", ExactSpelling:=True)>
Public Shared Function Dhcpv6ReleasePrefix(
    <MarshalAs(UnmanagedType.LPWStr)> adapterName As String,   ' LPWSTR
    classId As IntPtr,   ' DHCPV6CAPI_CLASSID* in/out
    leaseInfo As IntPtr   ' DHCPV6PrefixLeaseInformation* in/out
) As UInteger
End Function

' adapterName : LPWSTR
' classId : DHCPV6CAPI_CLASSID* in/out
' leaseInfo : DHCPV6PrefixLeaseInformation* in/out
Declare PtrSafe Function Dhcpv6ReleasePrefix Lib "dhcpcsvc6" ( _
    ByVal adapterName As LongPtr, _
    ByVal classId As LongPtr, _
    ByVal leaseInfo 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

Dhcpv6ReleasePrefix = ctypes.windll.dhcpcsvc6.Dhcpv6ReleasePrefix
Dhcpv6ReleasePrefix.restype = wintypes.DWORD
Dhcpv6ReleasePrefix.argtypes = [
    wintypes.LPCWSTR,  # adapterName : LPWSTR
    ctypes.c_void_p,  # classId : DHCPV6CAPI_CLASSID* in/out
    ctypes.c_void_p,  # leaseInfo : DHCPV6PrefixLeaseInformation* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dhcpcsvc6.dll')
Dhcpv6ReleasePrefix = Fiddle::Function.new(
  lib['Dhcpv6ReleasePrefix'],
  [
    Fiddle::TYPE_VOIDP,  # adapterName : LPWSTR
    Fiddle::TYPE_VOIDP,  # classId : DHCPV6CAPI_CLASSID* in/out
    Fiddle::TYPE_VOIDP,  # leaseInfo : DHCPV6PrefixLeaseInformation* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpcsvc6")]
extern "system" {
    fn Dhcpv6ReleasePrefix(
        adapterName: *mut u16,  // LPWSTR
        classId: *mut DHCPV6CAPI_CLASSID,  // DHCPV6CAPI_CLASSID* in/out
        leaseInfo: *mut DHCPV6PrefixLeaseInformation  // DHCPV6PrefixLeaseInformation* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dhcpcsvc6.dll")]
public static extern uint Dhcpv6ReleasePrefix([MarshalAs(UnmanagedType.LPWStr)] string adapterName, IntPtr classId, IntPtr leaseInfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dhcpcsvc6_Dhcpv6ReleasePrefix' -Namespace Win32 -PassThru
# $api::Dhcpv6ReleasePrefix(adapterName, classId, leaseInfo)

#uselib "dhcpcsvc6.dll"
#func global Dhcpv6ReleasePrefix "Dhcpv6ReleasePrefix" sptr, sptr, sptr
; Dhcpv6ReleasePrefix adapterName, varptr(classId), varptr(leaseInfo)   ; 戻り値は stat
; adapterName : LPWSTR -> "sptr"
; classId : DHCPV6CAPI_CLASSID* in/out -> "sptr"
; leaseInfo : DHCPV6PrefixLeaseInformation* 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。

#uselib "dhcpcsvc6.dll"
#cfunc global Dhcpv6ReleasePrefix "Dhcpv6ReleasePrefix" wstr, var, var
; res = Dhcpv6ReleasePrefix(adapterName, classId, leaseInfo)
; adapterName : LPWSTR -> "wstr"
; classId : DHCPV6CAPI_CLASSID* in/out -> "var"
; leaseInfo : DHCPV6PrefixLeaseInformation* 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。

; DWORD Dhcpv6ReleasePrefix(LPWSTR adapterName, DHCPV6CAPI_CLASSID* classId, DHCPV6PrefixLeaseInformation* leaseInfo)
#uselib "dhcpcsvc6.dll"
#cfunc global Dhcpv6ReleasePrefix "Dhcpv6ReleasePrefix" wstr, var, var
; res = Dhcpv6ReleasePrefix(adapterName, classId, leaseInfo)
; adapterName : LPWSTR -> "wstr"
; classId : DHCPV6CAPI_CLASSID* in/out -> "var"
; leaseInfo : DHCPV6PrefixLeaseInformation* 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。

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

var (
	dhcpcsvc6 = windows.NewLazySystemDLL("dhcpcsvc6.dll")
	procDhcpv6ReleasePrefix = dhcpcsvc6.NewProc("Dhcpv6ReleasePrefix")
)

// adapterName (LPWSTR), classId (DHCPV6CAPI_CLASSID* in/out), leaseInfo (DHCPV6PrefixLeaseInformation* in/out)
r1, _, err := procDhcpv6ReleasePrefix.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(adapterName))),
	uintptr(classId),
	uintptr(leaseInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function Dhcpv6ReleasePrefix(
  adapterName: PWideChar;   // LPWSTR
  classId: Pointer;   // DHCPV6CAPI_CLASSID* in/out
  leaseInfo: Pointer   // DHCPV6PrefixLeaseInformation* in/out
): DWORD; stdcall;
  external 'dhcpcsvc6.dll' name 'Dhcpv6ReleasePrefix';

result := DllCall("dhcpcsvc6\Dhcpv6ReleasePrefix"
    , "WStr", adapterName   ; LPWSTR
    , "Ptr", classId   ; DHCPV6CAPI_CLASSID* in/out
    , "Ptr", leaseInfo   ; DHCPV6PrefixLeaseInformation* in/out
    , "UInt")   ; return: DWORD

●Dhcpv6ReleasePrefix(adapterName, classId, leaseInfo) = DLL("dhcpcsvc6.dll", "dword Dhcpv6ReleasePrefix(char*, void*, void*)")
# 呼び出し: Dhcpv6ReleasePrefix(adapterName, classId, leaseInfo)
# adapterName : LPWSTR -> "char*"
# classId : DHCPV6CAPI_CLASSID* in/out -> "void*"
# leaseInfo : DHCPV6PrefixLeaseInformation* 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)。