SetupDiGetClassDevsW

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

HDEVINFO SetupDiGetClassDevsW(
    const GUID* ClassGuid,   // optional
    LPCWSTR Enumerator,   // optional
    HWND hwndParent,   // optional
    SETUP_DI_GET_CLASS_DEVS_FLAGS Flags
);

<DllImport("SETUPAPI.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetupDiGetClassDevsW(
    ClassGuid As IntPtr,   ' GUID* optional
    <MarshalAs(UnmanagedType.LPWStr)> Enumerator As String,   ' LPCWSTR optional
    hwndParent As IntPtr,   ' HWND optional
    Flags As UInteger   ' SETUP_DI_GET_CLASS_DEVS_FLAGS
) As IntPtr
End Function

' ClassGuid : GUID* optional
' Enumerator : LPCWSTR optional
' hwndParent : HWND optional
' Flags : SETUP_DI_GET_CLASS_DEVS_FLAGS
Declare PtrSafe Function SetupDiGetClassDevsW Lib "setupapi" ( _
    ByVal ClassGuid As LongPtr, _
    ByVal Enumerator As LongPtr, _
    ByVal hwndParent As LongPtr, _
    ByVal Flags As Long) 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

SetupDiGetClassDevsW = ctypes.windll.setupapi.SetupDiGetClassDevsW
SetupDiGetClassDevsW.restype = ctypes.c_ssize_t
SetupDiGetClassDevsW.argtypes = [
    ctypes.c_void_p,  # ClassGuid : GUID* optional
    wintypes.LPCWSTR,  # Enumerator : LPCWSTR optional
    wintypes.HANDLE,  # hwndParent : HWND optional
    wintypes.DWORD,  # Flags : SETUP_DI_GET_CLASS_DEVS_FLAGS
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SETUPAPI.dll')
SetupDiGetClassDevsW = Fiddle::Function.new(
  lib['SetupDiGetClassDevsW'],
  [
    Fiddle::TYPE_VOIDP,  # ClassGuid : GUID* optional
    Fiddle::TYPE_VOIDP,  # Enumerator : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # hwndParent : HWND optional
    -Fiddle::TYPE_INT,  # Flags : SETUP_DI_GET_CLASS_DEVS_FLAGS
  ],
  Fiddle::TYPE_INTPTR_T)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "setupapi")]
extern "system" {
    fn SetupDiGetClassDevsW(
        ClassGuid: *const GUID,  // GUID* optional
        Enumerator: *const u16,  // LPCWSTR optional
        hwndParent: *mut core::ffi::c_void,  // HWND optional
        Flags: u32  // SETUP_DI_GET_CLASS_DEVS_FLAGS
    ) -> isize;
}
// crates: windows-sys provides ready-made bindings for this API.

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

#uselib "SETUPAPI.dll"
#func global SetupDiGetClassDevsW "SetupDiGetClassDevsW" wptr, wptr, wptr, wptr
; SetupDiGetClassDevsW varptr(ClassGuid), Enumerator, hwndParent, Flags   ; 戻り値は stat
; ClassGuid : GUID* optional -> "wptr"
; Enumerator : LPCWSTR optional -> "wptr"
; hwndParent : HWND optional -> "wptr"
; Flags : SETUP_DI_GET_CLASS_DEVS_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 "SETUPAPI.dll"
#cfunc global SetupDiGetClassDevsW "SetupDiGetClassDevsW" var, wstr, sptr, int
; res = SetupDiGetClassDevsW(ClassGuid, Enumerator, hwndParent, Flags)
; ClassGuid : GUID* optional -> "var"
; Enumerator : LPCWSTR optional -> "wstr"
; hwndParent : HWND optional -> "sptr"
; Flags : SETUP_DI_GET_CLASS_DEVS_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。

; HDEVINFO SetupDiGetClassDevsW(GUID* ClassGuid, LPCWSTR Enumerator, HWND hwndParent, SETUP_DI_GET_CLASS_DEVS_FLAGS Flags)
#uselib "SETUPAPI.dll"
#cfunc global SetupDiGetClassDevsW "SetupDiGetClassDevsW" var, wstr, intptr, int
; res = SetupDiGetClassDevsW(ClassGuid, Enumerator, hwndParent, Flags)
; ClassGuid : GUID* optional -> "var"
; Enumerator : LPCWSTR optional -> "wstr"
; hwndParent : HWND optional -> "intptr"
; Flags : SETUP_DI_GET_CLASS_DEVS_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 (
	setupapi = windows.NewLazySystemDLL("SETUPAPI.dll")
	procSetupDiGetClassDevsW = setupapi.NewProc("SetupDiGetClassDevsW")
)

// ClassGuid (GUID* optional), Enumerator (LPCWSTR optional), hwndParent (HWND optional), Flags (SETUP_DI_GET_CLASS_DEVS_FLAGS)
r1, _, err := procSetupDiGetClassDevsW.Call(
	uintptr(ClassGuid),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(Enumerator))),
	uintptr(hwndParent),
	uintptr(Flags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HDEVINFO

function SetupDiGetClassDevsW(
  ClassGuid: PGUID;   // GUID* optional
  Enumerator: PWideChar;   // LPCWSTR optional
  hwndParent: THandle;   // HWND optional
  Flags: DWORD   // SETUP_DI_GET_CLASS_DEVS_FLAGS
): NativeInt; stdcall;
  external 'SETUPAPI.dll' name 'SetupDiGetClassDevsW';

result := DllCall("SETUPAPI\SetupDiGetClassDevsW"
    , "Ptr", ClassGuid   ; GUID* optional
    , "WStr", Enumerator   ; LPCWSTR optional
    , "Ptr", hwndParent   ; HWND optional
    , "UInt", Flags   ; SETUP_DI_GET_CLASS_DEVS_FLAGS
    , "Ptr")   ; return: HDEVINFO

●SetupDiGetClassDevsW(ClassGuid, Enumerator, hwndParent, Flags) = DLL("SETUPAPI.dll", "int SetupDiGetClassDevsW(void*, char*, void*, dword)")
# 呼び出し: SetupDiGetClassDevsW(ClassGuid, Enumerator, hwndParent, Flags)
# ClassGuid : GUID* optional -> "void*"
# Enumerator : LPCWSTR optional -> "char*"
# hwndParent : HWND optional -> "void*"
# Flags : SETUP_DI_GET_CLASS_DEVS_FLAGS -> "dword"
# 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。