SetupDiOpenClassRegKeyExW

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

HKEY SetupDiOpenClassRegKeyExW(
    const GUID* ClassGuid,   // optional
    DWORD samDesired,
    DWORD Flags,
    LPCWSTR MachineName,   // optional
    void* Reserved   // optional
);

<DllImport("SETUPAPI.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetupDiOpenClassRegKeyExW(
    ClassGuid As IntPtr,   ' GUID* optional
    samDesired As UInteger,   ' DWORD
    Flags As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> MachineName As String,   ' LPCWSTR optional
    Reserved As IntPtr   ' void* optional
) As IntPtr
End Function

' ClassGuid : GUID* optional
' samDesired : DWORD
' Flags : DWORD
' MachineName : LPCWSTR optional
' Reserved : void* optional
Declare PtrSafe Function SetupDiOpenClassRegKeyExW Lib "setupapi" ( _
    ByVal ClassGuid As LongPtr, _
    ByVal samDesired As Long, _
    ByVal Flags As Long, _
    ByVal MachineName As LongPtr, _
    ByVal Reserved As LongPtr) As LongPtr
' 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

SetupDiOpenClassRegKeyExW = ctypes.windll.setupapi.SetupDiOpenClassRegKeyExW
SetupDiOpenClassRegKeyExW.restype = ctypes.c_void_p
SetupDiOpenClassRegKeyExW.argtypes = [
    ctypes.c_void_p,  # ClassGuid : GUID* optional
    wintypes.DWORD,  # samDesired : DWORD
    wintypes.DWORD,  # Flags : DWORD
    wintypes.LPCWSTR,  # MachineName : LPCWSTR optional
    ctypes.POINTER(None),  # Reserved : void* optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SETUPAPI.dll')
SetupDiOpenClassRegKeyExW = Fiddle::Function.new(
  lib['SetupDiOpenClassRegKeyExW'],
  [
    Fiddle::TYPE_VOIDP,  # ClassGuid : GUID* optional
    -Fiddle::TYPE_INT,  # samDesired : DWORD
    -Fiddle::TYPE_INT,  # Flags : DWORD
    Fiddle::TYPE_VOIDP,  # MachineName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # Reserved : void* optional
  ],
  Fiddle::TYPE_VOIDP)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "setupapi")]
extern "system" {
    fn SetupDiOpenClassRegKeyExW(
        ClassGuid: *const GUID,  // GUID* optional
        samDesired: u32,  // DWORD
        Flags: u32,  // DWORD
        MachineName: *const u16,  // LPCWSTR optional
        Reserved: *mut ()  // void* optional
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SETUPAPI.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern IntPtr SetupDiOpenClassRegKeyExW(IntPtr ClassGuid, uint samDesired, uint Flags, [MarshalAs(UnmanagedType.LPWStr)] string MachineName, IntPtr Reserved);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SETUPAPI_SetupDiOpenClassRegKeyExW' -Namespace Win32 -PassThru
# $api::SetupDiOpenClassRegKeyExW(ClassGuid, samDesired, Flags, MachineName, Reserved)

#uselib "SETUPAPI.dll"
#func global SetupDiOpenClassRegKeyExW "SetupDiOpenClassRegKeyExW" wptr, wptr, wptr, wptr, wptr
; SetupDiOpenClassRegKeyExW varptr(ClassGuid), samDesired, Flags, MachineName, Reserved   ; 戻り値は stat
; ClassGuid : GUID* optional -> "wptr"
; samDesired : DWORD -> "wptr"
; Flags : DWORD -> "wptr"
; MachineName : LPCWSTR optional -> "wptr"
; Reserved : void* optional -> "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 "SETUPAPI.dll"
#cfunc global SetupDiOpenClassRegKeyExW "SetupDiOpenClassRegKeyExW" var, int, int, wstr, sptr
; res = SetupDiOpenClassRegKeyExW(ClassGuid, samDesired, Flags, MachineName, Reserved)
; ClassGuid : GUID* optional -> "var"
; samDesired : DWORD -> "int"
; Flags : DWORD -> "int"
; MachineName : LPCWSTR optional -> "wstr"
; Reserved : void* optional -> "sptr"
; ※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。

; HKEY SetupDiOpenClassRegKeyExW(GUID* ClassGuid, DWORD samDesired, DWORD Flags, LPCWSTR MachineName, void* Reserved)
#uselib "SETUPAPI.dll"
#cfunc global SetupDiOpenClassRegKeyExW "SetupDiOpenClassRegKeyExW" var, int, int, wstr, intptr
; res = SetupDiOpenClassRegKeyExW(ClassGuid, samDesired, Flags, MachineName, Reserved)
; ClassGuid : GUID* optional -> "var"
; samDesired : DWORD -> "int"
; Flags : DWORD -> "int"
; MachineName : LPCWSTR optional -> "wstr"
; Reserved : void* optional -> "intptr"
; ※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 (
	setupapi = windows.NewLazySystemDLL("SETUPAPI.dll")
	procSetupDiOpenClassRegKeyExW = setupapi.NewProc("SetupDiOpenClassRegKeyExW")
)

// ClassGuid (GUID* optional), samDesired (DWORD), Flags (DWORD), MachineName (LPCWSTR optional), Reserved (void* optional)
r1, _, err := procSetupDiOpenClassRegKeyExW.Call(
	uintptr(ClassGuid),
	uintptr(samDesired),
	uintptr(Flags),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(MachineName))),
	uintptr(Reserved),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HKEY

function SetupDiOpenClassRegKeyExW(
  ClassGuid: PGUID;   // GUID* optional
  samDesired: DWORD;   // DWORD
  Flags: DWORD;   // DWORD
  MachineName: PWideChar;   // LPCWSTR optional
  Reserved: Pointer   // void* optional
): THandle; stdcall;
  external 'SETUPAPI.dll' name 'SetupDiOpenClassRegKeyExW';

result := DllCall("SETUPAPI\SetupDiOpenClassRegKeyExW"
    , "Ptr", ClassGuid   ; GUID* optional
    , "UInt", samDesired   ; DWORD
    , "UInt", Flags   ; DWORD
    , "WStr", MachineName   ; LPCWSTR optional
    , "Ptr", Reserved   ; void* optional
    , "Ptr")   ; return: HKEY

●SetupDiOpenClassRegKeyExW(ClassGuid, samDesired, Flags, MachineName, Reserved) = DLL("SETUPAPI.dll", "void* SetupDiOpenClassRegKeyExW(void*, dword, dword, char*, void*)")
# 呼び出し: SetupDiOpenClassRegKeyExW(ClassGuid, samDesired, Flags, MachineName, Reserved)
# ClassGuid : GUID* optional -> "void*"
# samDesired : DWORD -> "dword"
# Flags : DWORD -> "dword"
# MachineName : LPCWSTR optional -> "char*"
# Reserved : void* optional -> "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。