CM_Enumerate_Classes

// CFGMGR32.dll
#include <windows.h>

CONFIGRET CM_Enumerate_Classes(
    DWORD ulClassIndex,
    GUID* ClassGuid,
    CM_ENUMERATE_FLAGS ulFlags
);

<DllImport("CFGMGR32.dll", ExactSpelling:=True)>
Public Shared Function CM_Enumerate_Classes(
    ulClassIndex As UInteger,   ' DWORD
    <Out> ByRef ClassGuid As Guid,   ' GUID* out
    ulFlags As UInteger   ' CM_ENUMERATE_FLAGS
) As UInteger
End Function

' ulClassIndex : DWORD
' ClassGuid : GUID* out
' ulFlags : CM_ENUMERATE_FLAGS
Declare PtrSafe Function CM_Enumerate_Classes Lib "cfgmgr32" ( _
    ByVal ulClassIndex As Long, _
    ByVal ClassGuid As LongPtr, _
    ByVal ulFlags 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

CM_Enumerate_Classes = ctypes.windll.cfgmgr32.CM_Enumerate_Classes
CM_Enumerate_Classes.restype = wintypes.DWORD
CM_Enumerate_Classes.argtypes = [
    wintypes.DWORD,  # ulClassIndex : DWORD
    ctypes.c_void_p,  # ClassGuid : GUID* out
    wintypes.DWORD,  # ulFlags : CM_ENUMERATE_FLAGS
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CFGMGR32.dll')
CM_Enumerate_Classes = Fiddle::Function.new(
  lib['CM_Enumerate_Classes'],
  [
    -Fiddle::TYPE_INT,  # ulClassIndex : DWORD
    Fiddle::TYPE_VOIDP,  # ClassGuid : GUID* out
    -Fiddle::TYPE_INT,  # ulFlags : CM_ENUMERATE_FLAGS
  ],
  -Fiddle::TYPE_INT)

#[link(name = "cfgmgr32")]
extern "system" {
    fn CM_Enumerate_Classes(
        ulClassIndex: u32,  // DWORD
        ClassGuid: *mut GUID,  // GUID* out
        ulFlags: u32  // CM_ENUMERATE_FLAGS
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("CFGMGR32.dll")]
public static extern uint CM_Enumerate_Classes(uint ulClassIndex, out Guid ClassGuid, uint ulFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CFGMGR32_CM_Enumerate_Classes' -Namespace Win32 -PassThru
# $api::CM_Enumerate_Classes(ulClassIndex, ClassGuid, ulFlags)

#uselib "CFGMGR32.dll"
#func global CM_Enumerate_Classes "CM_Enumerate_Classes" sptr, sptr, sptr
; CM_Enumerate_Classes ulClassIndex, varptr(ClassGuid), ulFlags   ; 戻り値は stat
; ulClassIndex : DWORD -> "sptr"
; ClassGuid : GUID* out -> "sptr"
; ulFlags : CM_ENUMERATE_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 "CFGMGR32.dll"
#cfunc global CM_Enumerate_Classes "CM_Enumerate_Classes" int, var, int
; res = CM_Enumerate_Classes(ulClassIndex, ClassGuid, ulFlags)
; ulClassIndex : DWORD -> "int"
; ClassGuid : GUID* out -> "var"
; ulFlags : CM_ENUMERATE_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。

; CONFIGRET CM_Enumerate_Classes(DWORD ulClassIndex, GUID* ClassGuid, CM_ENUMERATE_FLAGS ulFlags)
#uselib "CFGMGR32.dll"
#cfunc global CM_Enumerate_Classes "CM_Enumerate_Classes" int, var, int
; res = CM_Enumerate_Classes(ulClassIndex, ClassGuid, ulFlags)
; ulClassIndex : DWORD -> "int"
; ClassGuid : GUID* out -> "var"
; ulFlags : CM_ENUMERATE_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 (
	cfgmgr32 = windows.NewLazySystemDLL("CFGMGR32.dll")
	procCM_Enumerate_Classes = cfgmgr32.NewProc("CM_Enumerate_Classes")
)

// ulClassIndex (DWORD), ClassGuid (GUID* out), ulFlags (CM_ENUMERATE_FLAGS)
r1, _, err := procCM_Enumerate_Classes.Call(
	uintptr(ulClassIndex),
	uintptr(ClassGuid),
	uintptr(ulFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // CONFIGRET

function CM_Enumerate_Classes(
  ulClassIndex: DWORD;   // DWORD
  ClassGuid: PGUID;   // GUID* out
  ulFlags: DWORD   // CM_ENUMERATE_FLAGS
): DWORD; stdcall;
  external 'CFGMGR32.dll' name 'CM_Enumerate_Classes';

result := DllCall("CFGMGR32\CM_Enumerate_Classes"
    , "UInt", ulClassIndex   ; DWORD
    , "Ptr", ClassGuid   ; GUID* out
    , "UInt", ulFlags   ; CM_ENUMERATE_FLAGS
    , "UInt")   ; return: CONFIGRET

●CM_Enumerate_Classes(ulClassIndex, ClassGuid, ulFlags) = DLL("CFGMGR32.dll", "dword CM_Enumerate_Classes(dword, void*, dword)")
# 呼び出し: CM_Enumerate_Classes(ulClassIndex, ClassGuid, ulFlags)
# ulClassIndex : DWORD -> "dword"
# ClassGuid : GUID* out -> "void*"
# ulFlags : CM_ENUMERATE_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)。