ホーム › System.Registry › RegQueryInfoKeyW

RegQueryInfoKeyW

関数

指定キーのサブキー数や値数などの情報を取得する。

DLLADVAPI32.dll文字セットUnicode (-W)呼出規約winapi対応OSWindows 2000 以降

シグネチャ

// ADVAPI32.dll  (Unicode / -W)
#include <windows.h>

WIN32_ERROR RegQueryInfoKeyW(
    HKEY hKey,
    LPWSTR lpClass,   // optional
    DWORD* lpcchClass,   // optional
    DWORD* lpReserved,   // optional
    DWORD* lpcSubKeys,   // optional
    DWORD* lpcbMaxSubKeyLen,   // optional
    DWORD* lpcbMaxClassLen,   // optional
    DWORD* lpcValues,   // optional
    DWORD* lpcbMaxValueNameLen,   // optional
    DWORD* lpcbMaxValueLen,   // optional
    DWORD* lpcbSecurityDescriptor,   // optional
    FILETIME* lpftLastWriteTime   // optional
);

パラメーター

名前	型	方向
hKey	HKEY	in
lpClass	LPWSTR	outoptional
lpcchClass	DWORD*	inoutoptional
lpReserved	DWORD*	optional
lpcSubKeys	DWORD*	outoptional
lpcbMaxSubKeyLen	DWORD*	outoptional
lpcbMaxClassLen	DWORD*	outoptional
lpcValues	DWORD*	outoptional
lpcbMaxValueNameLen	DWORD*	outoptional
lpcbMaxValueLen	DWORD*	outoptional
lpcbSecurityDescriptor	DWORD*	outoptional
lpftLastWriteTime	FILETIME*	outoptional

戻り値の型: WIN32_ERROR

各言語での呼び出し定義

// ADVAPI32.dll  (Unicode / -W)
#include <windows.h>

WIN32_ERROR RegQueryInfoKeyW(
    HKEY hKey,
    LPWSTR lpClass,   // optional
    DWORD* lpcchClass,   // optional
    DWORD* lpReserved,   // optional
    DWORD* lpcSubKeys,   // optional
    DWORD* lpcbMaxSubKeyLen,   // optional
    DWORD* lpcbMaxClassLen,   // optional
    DWORD* lpcValues,   // optional
    DWORD* lpcbMaxValueNameLen,   // optional
    DWORD* lpcbMaxValueLen,   // optional
    DWORD* lpcbSecurityDescriptor,   // optional
    FILETIME* lpftLastWriteTime   // optional
);

[DllImport("ADVAPI32.dll", CharSet = CharSet.Unicode, ExactSpelling = true)]
static extern uint RegQueryInfoKeyW(
    IntPtr hKey,   // HKEY
    [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpClass,   // LPWSTR optional, out
    IntPtr lpcchClass,   // DWORD* optional, in/out
    IntPtr lpReserved,   // DWORD* optional
    IntPtr lpcSubKeys,   // DWORD* optional, out
    IntPtr lpcbMaxSubKeyLen,   // DWORD* optional, out
    IntPtr lpcbMaxClassLen,   // DWORD* optional, out
    IntPtr lpcValues,   // DWORD* optional, out
    IntPtr lpcbMaxValueNameLen,   // DWORD* optional, out
    IntPtr lpcbMaxValueLen,   // DWORD* optional, out
    IntPtr lpcbSecurityDescriptor,   // DWORD* optional, out
    IntPtr lpftLastWriteTime   // FILETIME* optional, out
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function RegQueryInfoKeyW(
    hKey As IntPtr,   ' HKEY
    <MarshalAs(UnmanagedType.LPWStr)> lpClass As System.Text.StringBuilder,   ' LPWSTR optional, out
    lpcchClass As IntPtr,   ' DWORD* optional, in/out
    lpReserved As IntPtr,   ' DWORD* optional
    lpcSubKeys As IntPtr,   ' DWORD* optional, out
    lpcbMaxSubKeyLen As IntPtr,   ' DWORD* optional, out
    lpcbMaxClassLen As IntPtr,   ' DWORD* optional, out
    lpcValues As IntPtr,   ' DWORD* optional, out
    lpcbMaxValueNameLen As IntPtr,   ' DWORD* optional, out
    lpcbMaxValueLen As IntPtr,   ' DWORD* optional, out
    lpcbSecurityDescriptor As IntPtr,   ' DWORD* optional, out
    lpftLastWriteTime As IntPtr   ' FILETIME* optional, out
) As UInteger
End Function

' hKey : HKEY
' lpClass : LPWSTR optional, out
' lpcchClass : DWORD* optional, in/out
' lpReserved : DWORD* optional
' lpcSubKeys : DWORD* optional, out
' lpcbMaxSubKeyLen : DWORD* optional, out
' lpcbMaxClassLen : DWORD* optional, out
' lpcValues : DWORD* optional, out
' lpcbMaxValueNameLen : DWORD* optional, out
' lpcbMaxValueLen : DWORD* optional, out
' lpcbSecurityDescriptor : DWORD* optional, out
' lpftLastWriteTime : FILETIME* optional, out
Declare PtrSafe Function RegQueryInfoKeyW Lib "advapi32" ( _
    ByVal hKey As LongPtr, _
    ByVal lpClass As LongPtr, _
    ByVal lpcchClass As LongPtr, _
    ByVal lpReserved As LongPtr, _
    ByVal lpcSubKeys As LongPtr, _
    ByVal lpcbMaxSubKeyLen As LongPtr, _
    ByVal lpcbMaxClassLen As LongPtr, _
    ByVal lpcValues As LongPtr, _
    ByVal lpcbMaxValueNameLen As LongPtr, _
    ByVal lpcbMaxValueLen As LongPtr, _
    ByVal lpcbSecurityDescriptor As LongPtr, _
    ByVal lpftLastWriteTime As LongPtr) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

RegQueryInfoKeyW = ctypes.windll.advapi32.RegQueryInfoKeyW
RegQueryInfoKeyW.restype = wintypes.DWORD
RegQueryInfoKeyW.argtypes = [
    wintypes.HANDLE,  # hKey : HKEY
    wintypes.LPWSTR,  # lpClass : LPWSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # lpcchClass : DWORD* optional, in/out
    ctypes.POINTER(wintypes.DWORD),  # lpReserved : DWORD* optional
    ctypes.POINTER(wintypes.DWORD),  # lpcSubKeys : DWORD* optional, out
    ctypes.POINTER(wintypes.DWORD),  # lpcbMaxSubKeyLen : DWORD* optional, out
    ctypes.POINTER(wintypes.DWORD),  # lpcbMaxClassLen : DWORD* optional, out
    ctypes.POINTER(wintypes.DWORD),  # lpcValues : DWORD* optional, out
    ctypes.POINTER(wintypes.DWORD),  # lpcbMaxValueNameLen : DWORD* optional, out
    ctypes.POINTER(wintypes.DWORD),  # lpcbMaxValueLen : DWORD* optional, out
    ctypes.POINTER(wintypes.DWORD),  # lpcbSecurityDescriptor : DWORD* optional, out
    ctypes.c_void_p,  # lpftLastWriteTime : FILETIME* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
RegQueryInfoKeyW = Fiddle::Function.new(
  lib['RegQueryInfoKeyW'],
  [
    Fiddle::TYPE_VOIDP,  # hKey : HKEY
    Fiddle::TYPE_VOIDP,  # lpClass : LPWSTR optional, out
    Fiddle::TYPE_VOIDP,  # lpcchClass : DWORD* optional, in/out
    Fiddle::TYPE_VOIDP,  # lpReserved : DWORD* optional
    Fiddle::TYPE_VOIDP,  # lpcSubKeys : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # lpcbMaxSubKeyLen : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # lpcbMaxClassLen : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # lpcValues : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # lpcbMaxValueNameLen : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # lpcbMaxValueLen : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # lpcbSecurityDescriptor : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # lpftLastWriteTime : FILETIME* optional, out
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "advapi32")]
extern "system" {
    fn RegQueryInfoKeyW(
        hKey: *mut core::ffi::c_void,  // HKEY
        lpClass: *mut u16,  // LPWSTR optional, out
        lpcchClass: *mut u32,  // DWORD* optional, in/out
        lpReserved: *mut u32,  // DWORD* optional
        lpcSubKeys: *mut u32,  // DWORD* optional, out
        lpcbMaxSubKeyLen: *mut u32,  // DWORD* optional, out
        lpcbMaxClassLen: *mut u32,  // DWORD* optional, out
        lpcValues: *mut u32,  // DWORD* optional, out
        lpcbMaxValueNameLen: *mut u32,  // DWORD* optional, out
        lpcbMaxValueLen: *mut u32,  // DWORD* optional, out
        lpcbSecurityDescriptor: *mut u32,  // DWORD* optional, out
        lpftLastWriteTime: *mut FILETIME  // FILETIME* optional, out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ADVAPI32.dll", CharSet = CharSet.Unicode)]
public static extern uint RegQueryInfoKeyW(IntPtr hKey, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpClass, IntPtr lpcchClass, IntPtr lpReserved, IntPtr lpcSubKeys, IntPtr lpcbMaxSubKeyLen, IntPtr lpcbMaxClassLen, IntPtr lpcValues, IntPtr lpcbMaxValueNameLen, IntPtr lpcbMaxValueLen, IntPtr lpcbSecurityDescriptor, IntPtr lpftLastWriteTime);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_RegQueryInfoKeyW' -Namespace Win32 -PassThru
# $api::RegQueryInfoKeyW(hKey, lpClass, lpcchClass, lpReserved, lpcSubKeys, lpcbMaxSubKeyLen, lpcbMaxClassLen, lpcValues, lpcbMaxValueNameLen, lpcbMaxValueLen, lpcbSecurityDescriptor, lpftLastWriteTime)

#uselib "ADVAPI32.dll"
#func global RegQueryInfoKeyW "RegQueryInfoKeyW" wptr, wptr, wptr, wptr, wptr, wptr, wptr, wptr, wptr, wptr, wptr, wptr
; RegQueryInfoKeyW hKey, varptr(lpClass), varptr(lpcchClass), varptr(lpReserved), varptr(lpcSubKeys), varptr(lpcbMaxSubKeyLen), varptr(lpcbMaxClassLen), varptr(lpcValues), varptr(lpcbMaxValueNameLen), varptr(lpcbMaxValueLen), varptr(lpcbSecurityDescriptor), varptr(lpftLastWriteTime)   ; 戻り値は stat
; hKey : HKEY -> "wptr"
; lpClass : LPWSTR optional, out -> "wptr"
; lpcchClass : DWORD* optional, in/out -> "wptr"
; lpReserved : DWORD* optional -> "wptr"
; lpcSubKeys : DWORD* optional, out -> "wptr"
; lpcbMaxSubKeyLen : DWORD* optional, out -> "wptr"
; lpcbMaxClassLen : DWORD* optional, out -> "wptr"
; lpcValues : DWORD* optional, out -> "wptr"
; lpcbMaxValueNameLen : DWORD* optional, out -> "wptr"
; lpcbMaxValueLen : DWORD* optional, out -> "wptr"
; lpcbSecurityDescriptor : DWORD* optional, out -> "wptr"
; lpftLastWriteTime : FILETIME* optional, out -> "wptr"
; ※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 "ADVAPI32.dll"
#cfunc global RegQueryInfoKeyW "RegQueryInfoKeyW" sptr, var, var, var, var, var, var, var, var, var, var, var
; res = RegQueryInfoKeyW(hKey, lpClass, lpcchClass, lpReserved, lpcSubKeys, lpcbMaxSubKeyLen, lpcbMaxClassLen, lpcValues, lpcbMaxValueNameLen, lpcbMaxValueLen, lpcbSecurityDescriptor, lpftLastWriteTime)
; hKey : HKEY -> "sptr"
; lpClass : LPWSTR optional, out -> "var"
; lpcchClass : DWORD* optional, in/out -> "var"
; lpReserved : DWORD* optional -> "var"
; lpcSubKeys : DWORD* optional, out -> "var"
; lpcbMaxSubKeyLen : DWORD* optional, out -> "var"
; lpcbMaxClassLen : DWORD* optional, out -> "var"
; lpcValues : DWORD* optional, out -> "var"
; lpcbMaxValueNameLen : DWORD* optional, out -> "var"
; lpcbMaxValueLen : DWORD* optional, out -> "var"
; lpcbSecurityDescriptor : DWORD* optional, out -> "var"
; lpftLastWriteTime : FILETIME* optional, 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 "ADVAPI32.dll"
#cfunc global RegQueryInfoKeyW "RegQueryInfoKeyW" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; res = RegQueryInfoKeyW(hKey, varptr(lpClass), varptr(lpcchClass), varptr(lpReserved), varptr(lpcSubKeys), varptr(lpcbMaxSubKeyLen), varptr(lpcbMaxClassLen), varptr(lpcValues), varptr(lpcbMaxValueNameLen), varptr(lpcbMaxValueLen), varptr(lpcbSecurityDescriptor), varptr(lpftLastWriteTime))
; hKey : HKEY -> "sptr"
; lpClass : LPWSTR optional, out -> "sptr"
; lpcchClass : DWORD* optional, in/out -> "sptr"
; lpReserved : DWORD* optional -> "sptr"
; lpcSubKeys : DWORD* optional, out -> "sptr"
; lpcbMaxSubKeyLen : DWORD* optional, out -> "sptr"
; lpcbMaxClassLen : DWORD* optional, out -> "sptr"
; lpcValues : DWORD* optional, out -> "sptr"
; lpcbMaxValueNameLen : DWORD* optional, out -> "sptr"
; lpcbMaxValueLen : DWORD* optional, out -> "sptr"
; lpcbSecurityDescriptor : DWORD* optional, out -> "sptr"
; lpftLastWriteTime : FILETIME* optional, 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:

; WIN32_ERROR RegQueryInfoKeyW(HKEY hKey, LPWSTR lpClass, DWORD* lpcchClass, DWORD* lpReserved, DWORD* lpcSubKeys, DWORD* lpcbMaxSubKeyLen, DWORD* lpcbMaxClassLen, DWORD* lpcValues, DWORD* lpcbMaxValueNameLen, DWORD* lpcbMaxValueLen, DWORD* lpcbSecurityDescriptor, FILETIME* lpftLastWriteTime)
#uselib "ADVAPI32.dll"
#cfunc global RegQueryInfoKeyW "RegQueryInfoKeyW" intptr, var, var, var, var, var, var, var, var, var, var, var
; res = RegQueryInfoKeyW(hKey, lpClass, lpcchClass, lpReserved, lpcSubKeys, lpcbMaxSubKeyLen, lpcbMaxClassLen, lpcValues, lpcbMaxValueNameLen, lpcbMaxValueLen, lpcbSecurityDescriptor, lpftLastWriteTime)
; hKey : HKEY -> "intptr"
; lpClass : LPWSTR optional, out -> "var"
; lpcchClass : DWORD* optional, in/out -> "var"
; lpReserved : DWORD* optional -> "var"
; lpcSubKeys : DWORD* optional, out -> "var"
; lpcbMaxSubKeyLen : DWORD* optional, out -> "var"
; lpcbMaxClassLen : DWORD* optional, out -> "var"
; lpcValues : DWORD* optional, out -> "var"
; lpcbMaxValueNameLen : DWORD* optional, out -> "var"
; lpcbMaxValueLen : DWORD* optional, out -> "var"
; lpcbSecurityDescriptor : DWORD* optional, out -> "var"
; lpftLastWriteTime : FILETIME* optional, 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。; WIN32_ERROR RegQueryInfoKeyW(HKEY hKey, LPWSTR lpClass, DWORD* lpcchClass, DWORD* lpReserved, DWORD* lpcSubKeys, DWORD* lpcbMaxSubKeyLen, DWORD* lpcbMaxClassLen, DWORD* lpcValues, DWORD* lpcbMaxValueNameLen, DWORD* lpcbMaxValueLen, DWORD* lpcbSecurityDescriptor, FILETIME* lpftLastWriteTime)
#uselib "ADVAPI32.dll"
#cfunc global RegQueryInfoKeyW "RegQueryInfoKeyW" intptr, intptr, intptr, intptr, intptr, intptr, intptr, intptr, intptr, intptr, intptr, intptr
; res = RegQueryInfoKeyW(hKey, varptr(lpClass), varptr(lpcchClass), varptr(lpReserved), varptr(lpcSubKeys), varptr(lpcbMaxSubKeyLen), varptr(lpcbMaxClassLen), varptr(lpcValues), varptr(lpcbMaxValueNameLen), varptr(lpcbMaxValueLen), varptr(lpcbSecurityDescriptor), varptr(lpftLastWriteTime))
; hKey : HKEY -> "intptr"
; lpClass : LPWSTR optional, out -> "intptr"
; lpcchClass : DWORD* optional, in/out -> "intptr"
; lpReserved : DWORD* optional -> "intptr"
; lpcSubKeys : DWORD* optional, out -> "intptr"
; lpcbMaxSubKeyLen : DWORD* optional, out -> "intptr"
; lpcbMaxClassLen : DWORD* optional, out -> "intptr"
; lpcValues : DWORD* optional, out -> "intptr"
; lpcbMaxValueNameLen : DWORD* optional, out -> "intptr"
; lpcbMaxValueLen : DWORD* optional, out -> "intptr"
; lpcbSecurityDescriptor : DWORD* optional, out -> "intptr"
; lpftLastWriteTime : FILETIME* optional, 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 (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procRegQueryInfoKeyW = advapi32.NewProc("RegQueryInfoKeyW")
)

// hKey (HKEY), lpClass (LPWSTR optional, out), lpcchClass (DWORD* optional, in/out), lpReserved (DWORD* optional), lpcSubKeys (DWORD* optional, out), lpcbMaxSubKeyLen (DWORD* optional, out), lpcbMaxClassLen (DWORD* optional, out), lpcValues (DWORD* optional, out), lpcbMaxValueNameLen (DWORD* optional, out), lpcbMaxValueLen (DWORD* optional, out), lpcbSecurityDescriptor (DWORD* optional, out), lpftLastWriteTime (FILETIME* optional, out)
r1, _, err := procRegQueryInfoKeyW.Call(
	uintptr(hKey),
	uintptr(lpClass),
	uintptr(lpcchClass),
	uintptr(lpReserved),
	uintptr(lpcSubKeys),
	uintptr(lpcbMaxSubKeyLen),
	uintptr(lpcbMaxClassLen),
	uintptr(lpcValues),
	uintptr(lpcbMaxValueNameLen),
	uintptr(lpcbMaxValueLen),
	uintptr(lpcbSecurityDescriptor),
	uintptr(lpftLastWriteTime),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function RegQueryInfoKeyW(
  hKey: THandle;   // HKEY
  lpClass: PWideChar;   // LPWSTR optional, out
  lpcchClass: Pointer;   // DWORD* optional, in/out
  lpReserved: Pointer;   // DWORD* optional
  lpcSubKeys: Pointer;   // DWORD* optional, out
  lpcbMaxSubKeyLen: Pointer;   // DWORD* optional, out
  lpcbMaxClassLen: Pointer;   // DWORD* optional, out
  lpcValues: Pointer;   // DWORD* optional, out
  lpcbMaxValueNameLen: Pointer;   // DWORD* optional, out
  lpcbMaxValueLen: Pointer;   // DWORD* optional, out
  lpcbSecurityDescriptor: Pointer;   // DWORD* optional, out
  lpftLastWriteTime: Pointer   // FILETIME* optional, out
): DWORD; stdcall;
  external 'ADVAPI32.dll' name 'RegQueryInfoKeyW';

result := DllCall("ADVAPI32\RegQueryInfoKeyW"
    , "Ptr", hKey   ; HKEY
    , "Ptr", lpClass   ; LPWSTR optional, out
    , "Ptr", lpcchClass   ; DWORD* optional, in/out
    , "Ptr", lpReserved   ; DWORD* optional
    , "Ptr", lpcSubKeys   ; DWORD* optional, out
    , "Ptr", lpcbMaxSubKeyLen   ; DWORD* optional, out
    , "Ptr", lpcbMaxClassLen   ; DWORD* optional, out
    , "Ptr", lpcValues   ; DWORD* optional, out
    , "Ptr", lpcbMaxValueNameLen   ; DWORD* optional, out
    , "Ptr", lpcbMaxValueLen   ; DWORD* optional, out
    , "Ptr", lpcbSecurityDescriptor   ; DWORD* optional, out
    , "Ptr", lpftLastWriteTime   ; FILETIME* optional, out
    , "UInt")   ; return: WIN32_ERROR

●RegQueryInfoKeyW(hKey, lpClass, lpcchClass, lpReserved, lpcSubKeys, lpcbMaxSubKeyLen, lpcbMaxClassLen, lpcValues, lpcbMaxValueNameLen, lpcbMaxValueLen, lpcbSecurityDescriptor, lpftLastWriteTime) = DLL("ADVAPI32.dll", "dword RegQueryInfoKeyW(void*, char*, void*, void*, void*, void*, void*, void*, void*, void*, void*, void*)")
# 呼び出し: RegQueryInfoKeyW(hKey, lpClass, lpcchClass, lpReserved, lpcSubKeys, lpcbMaxSubKeyLen, lpcbMaxClassLen, lpcValues, lpcbMaxValueNameLen, lpcbMaxValueLen, lpcbSecurityDescriptor, lpftLastWriteTime)
# hKey : HKEY -> "void*"
# lpClass : LPWSTR optional, out -> "char*"
# lpcchClass : DWORD* optional, in/out -> "void*"
# lpReserved : DWORD* optional -> "void*"
# lpcSubKeys : DWORD* optional, out -> "void*"
# lpcbMaxSubKeyLen : DWORD* optional, out -> "void*"
# lpcbMaxClassLen : DWORD* optional, out -> "void*"
# lpcValues : DWORD* optional, out -> "void*"
# lpcbMaxValueNameLen : DWORD* optional, out -> "void*"
# lpcbMaxValueLen : DWORD* optional, out -> "void*"
# lpcbSecurityDescriptor : DWORD* optional, out -> "void*"
# lpftLastWriteTime : FILETIME* optional, 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。