ClusterRegQueryValue

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

INT ClusterRegQueryValue(
    HKEY hKey,
    LPCWSTR lpszValueName,
    DWORD* lpdwValueType,   // optional
    BYTE* lpData,   // optional
    DWORD* lpcbData   // optional
);

<DllImport("CLUSAPI.dll", ExactSpelling:=True)>
Public Shared Function ClusterRegQueryValue(
    hKey As IntPtr,   ' HKEY
    <MarshalAs(UnmanagedType.LPWStr)> lpszValueName As String,   ' LPCWSTR
    lpdwValueType As IntPtr,   ' DWORD* optional, out
    lpData As IntPtr,   ' BYTE* optional, out
    lpcbData As IntPtr   ' DWORD* optional, in/out
) As Integer
End Function

' hKey : HKEY
' lpszValueName : LPCWSTR
' lpdwValueType : DWORD* optional, out
' lpData : BYTE* optional, out
' lpcbData : DWORD* optional, in/out
Declare PtrSafe Function ClusterRegQueryValue Lib "clusapi" ( _
    ByVal hKey As LongPtr, _
    ByVal lpszValueName As LongPtr, _
    ByVal lpdwValueType As LongPtr, _
    ByVal lpData As LongPtr, _
    ByVal lpcbData 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

ClusterRegQueryValue = ctypes.windll.clusapi.ClusterRegQueryValue
ClusterRegQueryValue.restype = ctypes.c_int
ClusterRegQueryValue.argtypes = [
    wintypes.HANDLE,  # hKey : HKEY
    wintypes.LPCWSTR,  # lpszValueName : LPCWSTR
    ctypes.POINTER(wintypes.DWORD),  # lpdwValueType : DWORD* optional, out
    ctypes.POINTER(ctypes.c_ubyte),  # lpData : BYTE* optional, out
    ctypes.POINTER(wintypes.DWORD),  # lpcbData : DWORD* optional, in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CLUSAPI.dll')
ClusterRegQueryValue = Fiddle::Function.new(
  lib['ClusterRegQueryValue'],
  [
    Fiddle::TYPE_VOIDP,  # hKey : HKEY
    Fiddle::TYPE_VOIDP,  # lpszValueName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # lpdwValueType : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # lpData : BYTE* optional, out
    Fiddle::TYPE_VOIDP,  # lpcbData : DWORD* optional, in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "clusapi")]
extern "system" {
    fn ClusterRegQueryValue(
        hKey: *mut core::ffi::c_void,  // HKEY
        lpszValueName: *const u16,  // LPCWSTR
        lpdwValueType: *mut u32,  // DWORD* optional, out
        lpData: *mut u8,  // BYTE* optional, out
        lpcbData: *mut u32  // DWORD* optional, in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("CLUSAPI.dll")]
public static extern int ClusterRegQueryValue(IntPtr hKey, [MarshalAs(UnmanagedType.LPWStr)] string lpszValueName, IntPtr lpdwValueType, IntPtr lpData, IntPtr lpcbData);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CLUSAPI_ClusterRegQueryValue' -Namespace Win32 -PassThru
# $api::ClusterRegQueryValue(hKey, lpszValueName, lpdwValueType, lpData, lpcbData)

#uselib "CLUSAPI.dll"
#func global ClusterRegQueryValue "ClusterRegQueryValue" sptr, sptr, sptr, sptr, sptr
; ClusterRegQueryValue hKey, lpszValueName, varptr(lpdwValueType), varptr(lpData), varptr(lpcbData)   ; 戻り値は stat
; hKey : HKEY -> "sptr"
; lpszValueName : LPCWSTR -> "sptr"
; lpdwValueType : DWORD* optional, out -> "sptr"
; lpData : BYTE* optional, out -> "sptr"
; lpcbData : DWORD* optional, 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 "CLUSAPI.dll"
#cfunc global ClusterRegQueryValue "ClusterRegQueryValue" sptr, wstr, var, var, var
; res = ClusterRegQueryValue(hKey, lpszValueName, lpdwValueType, lpData, lpcbData)
; hKey : HKEY -> "sptr"
; lpszValueName : LPCWSTR -> "wstr"
; lpdwValueType : DWORD* optional, out -> "var"
; lpData : BYTE* optional, out -> "var"
; lpcbData : DWORD* optional, 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。

; INT ClusterRegQueryValue(HKEY hKey, LPCWSTR lpszValueName, DWORD* lpdwValueType, BYTE* lpData, DWORD* lpcbData)
#uselib "CLUSAPI.dll"
#cfunc global ClusterRegQueryValue "ClusterRegQueryValue" intptr, wstr, var, var, var
; res = ClusterRegQueryValue(hKey, lpszValueName, lpdwValueType, lpData, lpcbData)
; hKey : HKEY -> "intptr"
; lpszValueName : LPCWSTR -> "wstr"
; lpdwValueType : DWORD* optional, out -> "var"
; lpData : BYTE* optional, out -> "var"
; lpcbData : DWORD* optional, 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 (
	clusapi = windows.NewLazySystemDLL("CLUSAPI.dll")
	procClusterRegQueryValue = clusapi.NewProc("ClusterRegQueryValue")
)

// hKey (HKEY), lpszValueName (LPCWSTR), lpdwValueType (DWORD* optional, out), lpData (BYTE* optional, out), lpcbData (DWORD* optional, in/out)
r1, _, err := procClusterRegQueryValue.Call(
	uintptr(hKey),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszValueName))),
	uintptr(lpdwValueType),
	uintptr(lpData),
	uintptr(lpcbData),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function ClusterRegQueryValue(
  hKey: THandle;   // HKEY
  lpszValueName: PWideChar;   // LPCWSTR
  lpdwValueType: Pointer;   // DWORD* optional, out
  lpData: Pointer;   // BYTE* optional, out
  lpcbData: Pointer   // DWORD* optional, in/out
): Integer; stdcall;
  external 'CLUSAPI.dll' name 'ClusterRegQueryValue';

result := DllCall("CLUSAPI\ClusterRegQueryValue"
    , "Ptr", hKey   ; HKEY
    , "WStr", lpszValueName   ; LPCWSTR
    , "Ptr", lpdwValueType   ; DWORD* optional, out
    , "Ptr", lpData   ; BYTE* optional, out
    , "Ptr", lpcbData   ; DWORD* optional, in/out
    , "Int")   ; return: INT

●ClusterRegQueryValue(hKey, lpszValueName, lpdwValueType, lpData, lpcbData) = DLL("CLUSAPI.dll", "int ClusterRegQueryValue(void*, char*, void*, void*, void*)")
# 呼び出し: ClusterRegQueryValue(hKey, lpszValueName, lpdwValueType, lpData, lpcbData)
# hKey : HKEY -> "void*"
# lpszValueName : LPCWSTR -> "char*"
# lpdwValueType : DWORD* optional, out -> "void*"
# lpData : BYTE* optional, out -> "void*"
# lpcbData : DWORD* optional, 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)。