SetupDiClassGuidsFromNameW

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

BOOL SetupDiClassGuidsFromNameW(
    LPCWSTR ClassName,
    GUID* ClassGuidList,
    DWORD ClassGuidListSize,
    DWORD* RequiredSize
);

<DllImport("SETUPAPI.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetupDiClassGuidsFromNameW(
    <MarshalAs(UnmanagedType.LPWStr)> ClassName As String,   ' LPCWSTR
    <Out> ByRef ClassGuidList As Guid,   ' GUID* out
    ClassGuidListSize As UInteger,   ' DWORD
    <Out> ByRef RequiredSize As UInteger   ' DWORD* out
) As Boolean
End Function

' ClassName : LPCWSTR
' ClassGuidList : GUID* out
' ClassGuidListSize : DWORD
' RequiredSize : DWORD* out
Declare PtrSafe Function SetupDiClassGuidsFromNameW Lib "setupapi" ( _
    ByVal ClassName As LongPtr, _
    ByVal ClassGuidList As LongPtr, _
    ByVal ClassGuidListSize As Long, _
    ByRef RequiredSize 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

SetupDiClassGuidsFromNameW = ctypes.windll.setupapi.SetupDiClassGuidsFromNameW
SetupDiClassGuidsFromNameW.restype = wintypes.BOOL
SetupDiClassGuidsFromNameW.argtypes = [
    wintypes.LPCWSTR,  # ClassName : LPCWSTR
    ctypes.c_void_p,  # ClassGuidList : GUID* out
    wintypes.DWORD,  # ClassGuidListSize : DWORD
    ctypes.POINTER(wintypes.DWORD),  # RequiredSize : DWORD* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SETUPAPI.dll')
SetupDiClassGuidsFromNameW = Fiddle::Function.new(
  lib['SetupDiClassGuidsFromNameW'],
  [
    Fiddle::TYPE_VOIDP,  # ClassName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # ClassGuidList : GUID* out
    -Fiddle::TYPE_INT,  # ClassGuidListSize : DWORD
    Fiddle::TYPE_VOIDP,  # RequiredSize : DWORD* out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "setupapi")]
extern "system" {
    fn SetupDiClassGuidsFromNameW(
        ClassName: *const u16,  // LPCWSTR
        ClassGuidList: *mut GUID,  // GUID* out
        ClassGuidListSize: u32,  // DWORD
        RequiredSize: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("SETUPAPI.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool SetupDiClassGuidsFromNameW([MarshalAs(UnmanagedType.LPWStr)] string ClassName, out Guid ClassGuidList, uint ClassGuidListSize, out uint RequiredSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SETUPAPI_SetupDiClassGuidsFromNameW' -Namespace Win32 -PassThru
# $api::SetupDiClassGuidsFromNameW(ClassName, ClassGuidList, ClassGuidListSize, RequiredSize)

#uselib "SETUPAPI.dll"
#func global SetupDiClassGuidsFromNameW "SetupDiClassGuidsFromNameW" wptr, wptr, wptr, wptr
; SetupDiClassGuidsFromNameW ClassName, varptr(ClassGuidList), ClassGuidListSize, varptr(RequiredSize)   ; 戻り値は stat
; ClassName : LPCWSTR -> "wptr"
; ClassGuidList : GUID* out -> "wptr"
; ClassGuidListSize : DWORD -> "wptr"
; RequiredSize : DWORD* out -> "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 SetupDiClassGuidsFromNameW "SetupDiClassGuidsFromNameW" wstr, var, int, var
; res = SetupDiClassGuidsFromNameW(ClassName, ClassGuidList, ClassGuidListSize, RequiredSize)
; ClassName : LPCWSTR -> "wstr"
; ClassGuidList : GUID* out -> "var"
; ClassGuidListSize : DWORD -> "int"
; RequiredSize : DWORD* 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。

; BOOL SetupDiClassGuidsFromNameW(LPCWSTR ClassName, GUID* ClassGuidList, DWORD ClassGuidListSize, DWORD* RequiredSize)
#uselib "SETUPAPI.dll"
#cfunc global SetupDiClassGuidsFromNameW "SetupDiClassGuidsFromNameW" wstr, var, int, var
; res = SetupDiClassGuidsFromNameW(ClassName, ClassGuidList, ClassGuidListSize, RequiredSize)
; ClassName : LPCWSTR -> "wstr"
; ClassGuidList : GUID* out -> "var"
; ClassGuidListSize : DWORD -> "int"
; RequiredSize : DWORD* 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 (
	setupapi = windows.NewLazySystemDLL("SETUPAPI.dll")
	procSetupDiClassGuidsFromNameW = setupapi.NewProc("SetupDiClassGuidsFromNameW")
)

// ClassName (LPCWSTR), ClassGuidList (GUID* out), ClassGuidListSize (DWORD), RequiredSize (DWORD* out)
r1, _, err := procSetupDiClassGuidsFromNameW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ClassName))),
	uintptr(ClassGuidList),
	uintptr(ClassGuidListSize),
	uintptr(RequiredSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SetupDiClassGuidsFromNameW(
  ClassName: PWideChar;   // LPCWSTR
  ClassGuidList: PGUID;   // GUID* out
  ClassGuidListSize: DWORD;   // DWORD
  RequiredSize: Pointer   // DWORD* out
): BOOL; stdcall;
  external 'SETUPAPI.dll' name 'SetupDiClassGuidsFromNameW';

result := DllCall("SETUPAPI\SetupDiClassGuidsFromNameW"
    , "WStr", ClassName   ; LPCWSTR
    , "Ptr", ClassGuidList   ; GUID* out
    , "UInt", ClassGuidListSize   ; DWORD
    , "Ptr", RequiredSize   ; DWORD* out
    , "Int")   ; return: BOOL

●SetupDiClassGuidsFromNameW(ClassName, ClassGuidList, ClassGuidListSize, RequiredSize) = DLL("SETUPAPI.dll", "bool SetupDiClassGuidsFromNameW(char*, void*, dword, void*)")
# 呼び出し: SetupDiClassGuidsFromNameW(ClassName, ClassGuidList, ClassGuidListSize, RequiredSize)
# ClassName : LPCWSTR -> "char*"
# ClassGuidList : GUID* out -> "void*"
# ClassGuidListSize : DWORD -> "dword"
# RequiredSize : DWORD* 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。