SHRegQueryInfoUSKeyA

// SHLWAPI.dll  (ANSI / -A)
#include <windows.h>

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

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SHRegQueryInfoUSKeyA(
    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 SHRegQueryInfoUSKeyA 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
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SHRegQueryInfoUSKeyA = ctypes.windll.shlwapi.SHRegQueryInfoUSKeyA
SHRegQueryInfoUSKeyA.restype = wintypes.DWORD
SHRegQueryInfoUSKeyA.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')
SHRegQueryInfoUSKeyA = Fiddle::Function.new(
  lib['SHRegQueryInfoUSKeyA'],
  [
    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)

#[link(name = "shlwapi")]
extern "system" {
    fn SHRegQueryInfoUSKeyA(
        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.Ansi)]
public static extern uint SHRegQueryInfoUSKeyA(IntPtr hUSKey, IntPtr pcSubKeys, IntPtr pcchMaxSubKeyLen, IntPtr pcValues, IntPtr pcchMaxValueNameLen, int enumRegFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_SHRegQueryInfoUSKeyA' -Namespace Win32 -PassThru
# $api::SHRegQueryInfoUSKeyA(hUSKey, pcSubKeys, pcchMaxSubKeyLen, pcValues, pcchMaxValueNameLen, enumRegFlags)

#uselib "SHLWAPI.dll"
#func global SHRegQueryInfoUSKeyA "SHRegQueryInfoUSKeyA" sptr, sptr, sptr, sptr, sptr, sptr
; SHRegQueryInfoUSKeyA hUSKey, varptr(pcSubKeys), varptr(pcchMaxSubKeyLen), varptr(pcValues), varptr(pcchMaxValueNameLen), enumRegFlags   ; 戻り値は stat
; hUSKey : INT_PTR -> "sptr"
; pcSubKeys : DWORD* optional, out -> "sptr"
; pcchMaxSubKeyLen : DWORD* optional, out -> "sptr"
; pcValues : DWORD* optional, out -> "sptr"
; pcchMaxValueNameLen : DWORD* optional, out -> "sptr"
; enumRegFlags : SHREGENUM_FLAGS -> "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 "SHLWAPI.dll"
#cfunc global SHRegQueryInfoUSKeyA "SHRegQueryInfoUSKeyA" sptr, var, var, var, var, int
; res = SHRegQueryInfoUSKeyA(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 SHRegQueryInfoUSKeyA(INT_PTR hUSKey, DWORD* pcSubKeys, DWORD* pcchMaxSubKeyLen, DWORD* pcValues, DWORD* pcchMaxValueNameLen, SHREGENUM_FLAGS enumRegFlags)
#uselib "SHLWAPI.dll"
#cfunc global SHRegQueryInfoUSKeyA "SHRegQueryInfoUSKeyA" intptr, var, var, var, var, int
; res = SHRegQueryInfoUSKeyA(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")
	procSHRegQueryInfoUSKeyA = shlwapi.NewProc("SHRegQueryInfoUSKeyA")
)

// hUSKey (INT_PTR), pcSubKeys (DWORD* optional, out), pcchMaxSubKeyLen (DWORD* optional, out), pcValues (DWORD* optional, out), pcchMaxValueNameLen (DWORD* optional, out), enumRegFlags (SHREGENUM_FLAGS)
r1, _, err := procSHRegQueryInfoUSKeyA.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 SHRegQueryInfoUSKeyA(
  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 'SHRegQueryInfoUSKeyA';

result := DllCall("SHLWAPI\SHRegQueryInfoUSKeyA"
    , "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

●SHRegQueryInfoUSKeyA(hUSKey, pcSubKeys, pcchMaxSubKeyLen, pcValues, pcchMaxValueNameLen, enumRegFlags) = DLL("SHLWAPI.dll", "dword SHRegQueryInfoUSKeyA(int, void*, void*, void*, void*, int)")
# 呼び出し: SHRegQueryInfoUSKeyA(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)。