RegNotifyChangeKeyValue

// ADVAPI32.dll
#include <windows.h>

WIN32_ERROR RegNotifyChangeKeyValue(
    HKEY hKey,
    BOOL bWatchSubtree,
    REG_NOTIFY_FILTER dwNotifyFilter,
    HANDLE hEvent,   // optional
    BOOL fAsynchronous
);

<DllImport("ADVAPI32.dll", ExactSpelling:=True)>
Public Shared Function RegNotifyChangeKeyValue(
    hKey As IntPtr,   ' HKEY
    bWatchSubtree As Boolean,   ' BOOL
    dwNotifyFilter As UInteger,   ' REG_NOTIFY_FILTER
    hEvent As IntPtr,   ' HANDLE optional
    fAsynchronous As Boolean   ' BOOL
) As UInteger
End Function

' hKey : HKEY
' bWatchSubtree : BOOL
' dwNotifyFilter : REG_NOTIFY_FILTER
' hEvent : HANDLE optional
' fAsynchronous : BOOL
Declare PtrSafe Function RegNotifyChangeKeyValue Lib "advapi32" ( _
    ByVal hKey As LongPtr, _
    ByVal bWatchSubtree As Long, _
    ByVal dwNotifyFilter As Long, _
    ByVal hEvent As LongPtr, _
    ByVal fAsynchronous As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

RegNotifyChangeKeyValue = ctypes.windll.advapi32.RegNotifyChangeKeyValue
RegNotifyChangeKeyValue.restype = wintypes.DWORD
RegNotifyChangeKeyValue.argtypes = [
    wintypes.HANDLE,  # hKey : HKEY
    wintypes.BOOL,  # bWatchSubtree : BOOL
    wintypes.DWORD,  # dwNotifyFilter : REG_NOTIFY_FILTER
    wintypes.HANDLE,  # hEvent : HANDLE optional
    wintypes.BOOL,  # fAsynchronous : BOOL
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
RegNotifyChangeKeyValue = Fiddle::Function.new(
  lib['RegNotifyChangeKeyValue'],
  [
    Fiddle::TYPE_VOIDP,  # hKey : HKEY
    Fiddle::TYPE_INT,  # bWatchSubtree : BOOL
    -Fiddle::TYPE_INT,  # dwNotifyFilter : REG_NOTIFY_FILTER
    Fiddle::TYPE_VOIDP,  # hEvent : HANDLE optional
    Fiddle::TYPE_INT,  # fAsynchronous : BOOL
  ],
  -Fiddle::TYPE_INT)

#[link(name = "advapi32")]
extern "system" {
    fn RegNotifyChangeKeyValue(
        hKey: *mut core::ffi::c_void,  // HKEY
        bWatchSubtree: i32,  // BOOL
        dwNotifyFilter: u32,  // REG_NOTIFY_FILTER
        hEvent: *mut core::ffi::c_void,  // HANDLE optional
        fAsynchronous: i32  // BOOL
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ADVAPI32.dll")]
public static extern uint RegNotifyChangeKeyValue(IntPtr hKey, bool bWatchSubtree, uint dwNotifyFilter, IntPtr hEvent, bool fAsynchronous);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_RegNotifyChangeKeyValue' -Namespace Win32 -PassThru
# $api::RegNotifyChangeKeyValue(hKey, bWatchSubtree, dwNotifyFilter, hEvent, fAsynchronous)

#uselib "ADVAPI32.dll"
#func global RegNotifyChangeKeyValue "RegNotifyChangeKeyValue" sptr, sptr, sptr, sptr, sptr
; RegNotifyChangeKeyValue hKey, bWatchSubtree, dwNotifyFilter, hEvent, fAsynchronous   ; 戻り値は stat
; hKey : HKEY -> "sptr"
; bWatchSubtree : BOOL -> "sptr"
; dwNotifyFilter : REG_NOTIFY_FILTER -> "sptr"
; hEvent : HANDLE optional -> "sptr"
; fAsynchronous : BOOL -> "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 "ADVAPI32.dll"
#cfunc global RegNotifyChangeKeyValue "RegNotifyChangeKeyValue" sptr, int, int, sptr, int
; res = RegNotifyChangeKeyValue(hKey, bWatchSubtree, dwNotifyFilter, hEvent, fAsynchronous)
; hKey : HKEY -> "sptr"
; bWatchSubtree : BOOL -> "int"
; dwNotifyFilter : REG_NOTIFY_FILTER -> "int"
; hEvent : HANDLE optional -> "sptr"
; fAsynchronous : BOOL -> "int"

; WIN32_ERROR RegNotifyChangeKeyValue(HKEY hKey, BOOL bWatchSubtree, REG_NOTIFY_FILTER dwNotifyFilter, HANDLE hEvent, BOOL fAsynchronous)
#uselib "ADVAPI32.dll"
#cfunc global RegNotifyChangeKeyValue "RegNotifyChangeKeyValue" intptr, int, int, intptr, int
; res = RegNotifyChangeKeyValue(hKey, bWatchSubtree, dwNotifyFilter, hEvent, fAsynchronous)
; hKey : HKEY -> "intptr"
; bWatchSubtree : BOOL -> "int"
; dwNotifyFilter : REG_NOTIFY_FILTER -> "int"
; hEvent : HANDLE optional -> "intptr"
; fAsynchronous : BOOL -> "int"

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

var (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procRegNotifyChangeKeyValue = advapi32.NewProc("RegNotifyChangeKeyValue")
)

// hKey (HKEY), bWatchSubtree (BOOL), dwNotifyFilter (REG_NOTIFY_FILTER), hEvent (HANDLE optional), fAsynchronous (BOOL)
r1, _, err := procRegNotifyChangeKeyValue.Call(
	uintptr(hKey),
	uintptr(bWatchSubtree),
	uintptr(dwNotifyFilter),
	uintptr(hEvent),
	uintptr(fAsynchronous),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function RegNotifyChangeKeyValue(
  hKey: THandle;   // HKEY
  bWatchSubtree: BOOL;   // BOOL
  dwNotifyFilter: DWORD;   // REG_NOTIFY_FILTER
  hEvent: THandle;   // HANDLE optional
  fAsynchronous: BOOL   // BOOL
): DWORD; stdcall;
  external 'ADVAPI32.dll' name 'RegNotifyChangeKeyValue';

result := DllCall("ADVAPI32\RegNotifyChangeKeyValue"
    , "Ptr", hKey   ; HKEY
    , "Int", bWatchSubtree   ; BOOL
    , "UInt", dwNotifyFilter   ; REG_NOTIFY_FILTER
    , "Ptr", hEvent   ; HANDLE optional
    , "Int", fAsynchronous   ; BOOL
    , "UInt")   ; return: WIN32_ERROR

●RegNotifyChangeKeyValue(hKey, bWatchSubtree, dwNotifyFilter, hEvent, fAsynchronous) = DLL("ADVAPI32.dll", "dword RegNotifyChangeKeyValue(void*, bool, dword, void*, bool)")
# 呼び出し: RegNotifyChangeKeyValue(hKey, bWatchSubtree, dwNotifyFilter, hEvent, fAsynchronous)
# hKey : HKEY -> "void*"
# bWatchSubtree : BOOL -> "bool"
# dwNotifyFilter : REG_NOTIFY_FILTER -> "dword"
# hEvent : HANDLE optional -> "void*"
# fAsynchronous : BOOL -> "bool"
# 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)。