SHRegQueryInfoUSKeyW

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

WIN32_ERROR SHRegQueryInfoUSKeyW(
    INT_PTR hUSKey,
    DWORD* pcSubKeys,   // optional
    DWORD* pcchMaxSubKeyLen,   // optional
    DWORD* pcValues,   // optional
    DWORD* pcchMaxValueNameLen,   // optional
    SHREGENUM_FLAGS enumRegFlags
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function SHRegQueryInfoUSKeyW(
    hUSKey As IntPtr,   ' INT_PTR
    pcSubKeys As IntPtr,   ' DWORD* optional, out
    pcchMaxSubKeyLen As IntPtr,   ' DWORD* optional, out
    pcValues As IntPtr,   ' DWORD* optional, out
    pcchMaxValueNameLen As IntPtr,   ' DWORD* optional, out
    enumRegFlags As Integer   ' SHREGENUM_FLAGS
) As UInteger
End Function

' hUSKey : INT_PTR
' pcSubKeys : DWORD* optional, out
' pcchMaxSubKeyLen : DWORD* optional, out
' pcValues : DWORD* optional, out
' pcchMaxValueNameLen : DWORD* optional, out
' enumRegFlags : SHREGENUM_FLAGS
Declare PtrSafe Function SHRegQueryInfoUSKeyW Lib "shlwapi" ( _
    ByVal hUSKey As LongPtr, _
    ByVal pcSubKeys As LongPtr, _
    ByVal pcchMaxSubKeyLen As LongPtr, _
    ByVal pcValues As LongPtr, _
    ByVal pcchMaxValueNameLen As LongPtr, _
    ByVal enumRegFlags As Long) 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

SHRegQueryInfoUSKeyW = ctypes.windll.shlwapi.SHRegQueryInfoUSKeyW
SHRegQueryInfoUSKeyW.restype = wintypes.DWORD
SHRegQueryInfoUSKeyW.argtypes = [
    ctypes.c_ssize_t,  # hUSKey : INT_PTR
    ctypes.POINTER(wintypes.DWORD),  # pcSubKeys : DWORD* optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchMaxSubKeyLen : DWORD* optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcValues : DWORD* optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchMaxValueNameLen : DWORD* optional, out
    ctypes.c_int,  # enumRegFlags : SHREGENUM_FLAGS
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
SHRegQueryInfoUSKeyW = Fiddle::Function.new(
  lib['SHRegQueryInfoUSKeyW'],
  [
    Fiddle::TYPE_INTPTR_T,  # hUSKey : INT_PTR
    Fiddle::TYPE_VOIDP,  # pcSubKeys : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # pcchMaxSubKeyLen : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # pcValues : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # pcchMaxValueNameLen : DWORD* optional, out
    Fiddle::TYPE_INT,  # enumRegFlags : SHREGENUM_FLAGS
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "shlwapi")]
extern "system" {
    fn SHRegQueryInfoUSKeyW(
        hUSKey: isize,  // INT_PTR
        pcSubKeys: *mut u32,  // DWORD* optional, out
        pcchMaxSubKeyLen: *mut u32,  // DWORD* optional, out
        pcValues: *mut u32,  // DWORD* optional, out
        pcchMaxValueNameLen: *mut u32,  // DWORD* optional, out
        enumRegFlags: i32  // SHREGENUM_FLAGS
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll", CharSet = CharSet.Unicode)]
public static extern uint SHRegQueryInfoUSKeyW(IntPtr hUSKey, IntPtr pcSubKeys, IntPtr pcchMaxSubKeyLen, IntPtr pcValues, IntPtr pcchMaxValueNameLen, int enumRegFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_SHRegQueryInfoUSKeyW' -Namespace Win32 -PassThru
# $api::SHRegQueryInfoUSKeyW(hUSKey, pcSubKeys, pcchMaxSubKeyLen, pcValues, pcchMaxValueNameLen, enumRegFlags)

#uselib "SHLWAPI.dll"
#func global SHRegQueryInfoUSKeyW "SHRegQueryInfoUSKeyW" wptr, wptr, wptr, wptr, wptr, wptr
; SHRegQueryInfoUSKeyW hUSKey, varptr(pcSubKeys), varptr(pcchMaxSubKeyLen), varptr(pcValues), varptr(pcchMaxValueNameLen), enumRegFlags   ; 戻り値は stat
; hUSKey : INT_PTR -> "wptr"
; pcSubKeys : DWORD* optional, out -> "wptr"
; pcchMaxSubKeyLen : DWORD* optional, out -> "wptr"
; pcValues : DWORD* optional, out -> "wptr"
; pcchMaxValueNameLen : DWORD* optional, out -> "wptr"
; enumRegFlags : SHREGENUM_FLAGS -> "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。

#uselib "SHLWAPI.dll"
#cfunc global SHRegQueryInfoUSKeyW "SHRegQueryInfoUSKeyW" sptr, var, var, var, var, int
; res = SHRegQueryInfoUSKeyW(hUSKey, pcSubKeys, pcchMaxSubKeyLen, pcValues, pcchMaxValueNameLen, enumRegFlags)
; hUSKey : INT_PTR -> "sptr"
; pcSubKeys : DWORD* optional, out -> "var"
; pcchMaxSubKeyLen : DWORD* optional, out -> "var"
; pcValues : DWORD* optional, out -> "var"
; pcchMaxValueNameLen : DWORD* optional, out -> "var"
; enumRegFlags : SHREGENUM_FLAGS -> "int"
; ※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 SHRegQueryInfoUSKeyW(INT_PTR hUSKey, DWORD* pcSubKeys, DWORD* pcchMaxSubKeyLen, DWORD* pcValues, DWORD* pcchMaxValueNameLen, SHREGENUM_FLAGS enumRegFlags)
#uselib "SHLWAPI.dll"
#cfunc global SHRegQueryInfoUSKeyW "SHRegQueryInfoUSKeyW" intptr, var, var, var, var, int
; res = SHRegQueryInfoUSKeyW(hUSKey, pcSubKeys, pcchMaxSubKeyLen, pcValues, pcchMaxValueNameLen, enumRegFlags)
; hUSKey : INT_PTR -> "intptr"
; pcSubKeys : DWORD* optional, out -> "var"
; pcchMaxSubKeyLen : DWORD* optional, out -> "var"
; pcValues : DWORD* optional, out -> "var"
; pcchMaxValueNameLen : DWORD* optional, out -> "var"
; enumRegFlags : SHREGENUM_FLAGS -> "int"
; ※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 (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procSHRegQueryInfoUSKeyW = shlwapi.NewProc("SHRegQueryInfoUSKeyW")
)

// hUSKey (INT_PTR), pcSubKeys (DWORD* optional, out), pcchMaxSubKeyLen (DWORD* optional, out), pcValues (DWORD* optional, out), pcchMaxValueNameLen (DWORD* optional, out), enumRegFlags (SHREGENUM_FLAGS)
r1, _, err := procSHRegQueryInfoUSKeyW.Call(
	uintptr(hUSKey),
	uintptr(pcSubKeys),
	uintptr(pcchMaxSubKeyLen),
	uintptr(pcValues),
	uintptr(pcchMaxValueNameLen),
	uintptr(enumRegFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function SHRegQueryInfoUSKeyW(
  hUSKey: NativeInt;   // INT_PTR
  pcSubKeys: Pointer;   // DWORD* optional, out
  pcchMaxSubKeyLen: Pointer;   // DWORD* optional, out
  pcValues: Pointer;   // DWORD* optional, out
  pcchMaxValueNameLen: Pointer;   // DWORD* optional, out
  enumRegFlags: Integer   // SHREGENUM_FLAGS
): DWORD; stdcall;
  external 'SHLWAPI.dll' name 'SHRegQueryInfoUSKeyW';

result := DllCall("SHLWAPI\SHRegQueryInfoUSKeyW"
    , "Ptr", hUSKey   ; INT_PTR
    , "Ptr", pcSubKeys   ; DWORD* optional, out
    , "Ptr", pcchMaxSubKeyLen   ; DWORD* optional, out
    , "Ptr", pcValues   ; DWORD* optional, out
    , "Ptr", pcchMaxValueNameLen   ; DWORD* optional, out
    , "Int", enumRegFlags   ; SHREGENUM_FLAGS
    , "UInt")   ; return: WIN32_ERROR

●SHRegQueryInfoUSKeyW(hUSKey, pcSubKeys, pcchMaxSubKeyLen, pcValues, pcchMaxValueNameLen, enumRegFlags) = DLL("SHLWAPI.dll", "dword SHRegQueryInfoUSKeyW(int, void*, void*, void*, void*, int)")
# 呼び出し: SHRegQueryInfoUSKeyW(hUSKey, pcSubKeys, pcchMaxSubKeyLen, pcValues, pcchMaxValueNameLen, enumRegFlags)
# hUSKey : INT_PTR -> "int"
# pcSubKeys : DWORD* optional, out -> "void*"
# pcchMaxSubKeyLen : DWORD* optional, out -> "void*"
# pcValues : DWORD* optional, out -> "void*"
# pcchMaxValueNameLen : DWORD* optional, out -> "void*"
# enumRegFlags : SHREGENUM_FLAGS -> "int"
# 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。