CM_Get_Class_Name_ExW

// CFGMGR32.dll  (Unicode / -W)
#include <windows.h>

CONFIGRET CM_Get_Class_Name_ExW(
    GUID* ClassGuid,
    LPWSTR Buffer,   // optional
    DWORD* pulLength,
    DWORD ulFlags,
    INT_PTR hMachine   // optional
);

<DllImport("CFGMGR32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function CM_Get_Class_Name_ExW(
    ByRef ClassGuid As Guid,   ' GUID*
    <MarshalAs(UnmanagedType.LPWStr)> Buffer As System.Text.StringBuilder,   ' LPWSTR optional, out
    ByRef pulLength As UInteger,   ' DWORD* in/out
    ulFlags As UInteger,   ' DWORD
    hMachine As IntPtr   ' INT_PTR optional
) As UInteger
End Function

' ClassGuid : GUID*
' Buffer : LPWSTR optional, out
' pulLength : DWORD* in/out
' ulFlags : DWORD
' hMachine : INT_PTR optional
Declare PtrSafe Function CM_Get_Class_Name_ExW Lib "cfgmgr32" ( _
    ByVal ClassGuid As LongPtr, _
    ByVal Buffer As LongPtr, _
    ByRef pulLength As Long, _
    ByVal ulFlags As Long, _
    ByVal hMachine As LongPtr) 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

CM_Get_Class_Name_ExW = ctypes.windll.cfgmgr32.CM_Get_Class_Name_ExW
CM_Get_Class_Name_ExW.restype = wintypes.DWORD
CM_Get_Class_Name_ExW.argtypes = [
    ctypes.c_void_p,  # ClassGuid : GUID*
    wintypes.LPWSTR,  # Buffer : LPWSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pulLength : DWORD* in/out
    wintypes.DWORD,  # ulFlags : DWORD
    ctypes.c_ssize_t,  # hMachine : INT_PTR optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CFGMGR32.dll')
CM_Get_Class_Name_ExW = Fiddle::Function.new(
  lib['CM_Get_Class_Name_ExW'],
  [
    Fiddle::TYPE_VOIDP,  # ClassGuid : GUID*
    Fiddle::TYPE_VOIDP,  # Buffer : LPWSTR optional, out
    Fiddle::TYPE_VOIDP,  # pulLength : DWORD* in/out
    -Fiddle::TYPE_INT,  # ulFlags : DWORD
    Fiddle::TYPE_INTPTR_T,  # hMachine : INT_PTR optional
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "cfgmgr32")]
extern "system" {
    fn CM_Get_Class_Name_ExW(
        ClassGuid: *mut GUID,  // GUID*
        Buffer: *mut u16,  // LPWSTR optional, out
        pulLength: *mut u32,  // DWORD* in/out
        ulFlags: u32,  // DWORD
        hMachine: isize  // INT_PTR optional
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("CFGMGR32.dll", CharSet = CharSet.Unicode)]
public static extern uint CM_Get_Class_Name_ExW(ref Guid ClassGuid, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder Buffer, ref uint pulLength, uint ulFlags, IntPtr hMachine);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CFGMGR32_CM_Get_Class_Name_ExW' -Namespace Win32 -PassThru
# $api::CM_Get_Class_Name_ExW(ClassGuid, Buffer, pulLength, ulFlags, hMachine)

#uselib "CFGMGR32.dll"
#func global CM_Get_Class_Name_ExW "CM_Get_Class_Name_ExW" wptr, wptr, wptr, wptr, wptr
; CM_Get_Class_Name_ExW varptr(ClassGuid), varptr(Buffer), varptr(pulLength), ulFlags, hMachine   ; 戻り値は stat
; ClassGuid : GUID* -> "wptr"
; Buffer : LPWSTR optional, out -> "wptr"
; pulLength : DWORD* in/out -> "wptr"
; ulFlags : DWORD -> "wptr"
; hMachine : INT_PTR 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。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	cfgmgr32 = windows.NewLazySystemDLL("CFGMGR32.dll")
	procCM_Get_Class_Name_ExW = cfgmgr32.NewProc("CM_Get_Class_Name_ExW")
)

// ClassGuid (GUID*), Buffer (LPWSTR optional, out), pulLength (DWORD* in/out), ulFlags (DWORD), hMachine (INT_PTR optional)
r1, _, err := procCM_Get_Class_Name_ExW.Call(
	uintptr(ClassGuid),
	uintptr(Buffer),
	uintptr(pulLength),
	uintptr(ulFlags),
	uintptr(hMachine),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // CONFIGRET

function CM_Get_Class_Name_ExW(
  ClassGuid: PGUID;   // GUID*
  Buffer: PWideChar;   // LPWSTR optional, out
  pulLength: Pointer;   // DWORD* in/out
  ulFlags: DWORD;   // DWORD
  hMachine: NativeInt   // INT_PTR optional
): DWORD; stdcall;
  external 'CFGMGR32.dll' name 'CM_Get_Class_Name_ExW';

result := DllCall("CFGMGR32\CM_Get_Class_Name_ExW"
    , "Ptr", ClassGuid   ; GUID*
    , "Ptr", Buffer   ; LPWSTR optional, out
    , "Ptr", pulLength   ; DWORD* in/out
    , "UInt", ulFlags   ; DWORD
    , "Ptr", hMachine   ; INT_PTR optional
    , "UInt")   ; return: CONFIGRET

●CM_Get_Class_Name_ExW(ClassGuid, Buffer, pulLength, ulFlags, hMachine) = DLL("CFGMGR32.dll", "dword CM_Get_Class_Name_ExW(void*, char*, void*, dword, int)")
# 呼び出し: CM_Get_Class_Name_ExW(ClassGuid, Buffer, pulLength, ulFlags, hMachine)
# ClassGuid : GUID* -> "void*"
# Buffer : LPWSTR optional, out -> "char*"
# pulLength : DWORD* in/out -> "void*"
# ulFlags : DWORD -> "dword"
# hMachine : INT_PTR optional -> "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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。

const std = @import("std");

extern "cfgmgr32" fn CM_Get_Class_Name_ExW(
    ClassGuid: [*c]GUID, // GUID*
    Buffer: [*c]u16, // LPWSTR optional, out
    pulLength: [*c]u32, // DWORD* in/out
    ulFlags: u32, // DWORD
    hMachine: isize // INT_PTR optional
) callconv(std.os.windows.WINAPI) u32;
// Unicode(-W): UTF-16LE のヌル終端バッファ([*c]const u16)を渡す。

proc CM_Get_Class_Name_ExW(
    ClassGuid: ptr GUID,  # GUID*
    Buffer: ptr uint16,  # LPWSTR optional, out
    pulLength: ptr uint32,  # DWORD* in/out
    ulFlags: uint32,  # DWORD
    hMachine: int  # INT_PTR optional
): uint32 {.importc: "CM_Get_Class_Name_ExW", stdcall, dynlib: "CFGMGR32.dll".}
# Unicode(-W): WideCString は newWideCString("...") で生成。

pragma(lib, "cfgmgr32");
extern(Windows)
uint CM_Get_Class_Name_ExW(
    GUID* ClassGuid,   // GUID*
    wchar* Buffer,   // LPWSTR optional, out
    uint* pulLength,   // DWORD* in/out
    uint ulFlags,   // DWORD
    ptrdiff_t hMachine   // INT_PTR optional
);

ccall((:CM_Get_Class_Name_ExW, "CFGMGR32.dll"), stdcall, UInt32,
      (Ptr{GUID}, Ptr{UInt16}, Ptr{UInt32}, UInt32, Int),
      ClassGuid, Buffer, pulLength, ulFlags, hMachine)
# ClassGuid : GUID* -> Ptr{GUID}
# Buffer : LPWSTR optional, out -> Ptr{UInt16}
# pulLength : DWORD* in/out -> Ptr{UInt32}
# ulFlags : DWORD -> UInt32
# hMachine : INT_PTR optional -> Int
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
# Unicode(-W): Cwstring には transcode(UInt16, "...") 等で UTF-16 を渡す。

local ffi = require("ffi")
ffi.cdef[[
uint32_t CM_Get_Class_Name_ExW(
    void* ClassGuid,
    uint16_t* Buffer,
    uint32_t* pulLength,
    uint32_t ulFlags,
    intptr_t hMachine);
]]
local cfgmgr32 = ffi.load("cfgmgr32")
-- cfgmgr32.CM_Get_Class_Name_ExW(ClassGuid, Buffer, pulLength, ulFlags, hMachine)
-- ClassGuid : GUID*
-- Buffer : LPWSTR optional, out
-- pulLength : DWORD* in/out
-- ulFlags : DWORD
-- hMachine : INT_PTR optional
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
-- Unicode(-W): uint16_t* には UTF-16LE のバッファ(ffi.new("uint16_t[?]", ...))を渡す。

const koffi = require('koffi');
const lib = koffi.load('CFGMGR32.dll');
const CM_Get_Class_Name_ExW = lib.func('__stdcall', 'CM_Get_Class_Name_ExW', 'uint32_t', ['void *', 'uint16_t *', 'uint32_t *', 'uint32_t', 'intptr_t']);
// CM_Get_Class_Name_ExW(ClassGuid, Buffer, pulLength, ulFlags, hMachine)
// ClassGuid : GUID* -> 'void *'
// Buffer : LPWSTR optional, out -> 'uint16_t *'
// pulLength : DWORD* in/out -> 'uint32_t *'
// ulFlags : DWORD -> 'uint32_t'
// hMachine : INT_PTR optional -> 'intptr_t'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("CFGMGR32.dll", {
  CM_Get_Class_Name_ExW: { parameters: ["pointer", "buffer", "pointer", "u32", "isize"], result: "u32" },
});
// lib.symbols.CM_Get_Class_Name_ExW(ClassGuid, Buffer, pulLength, ulFlags, hMachine)
// ClassGuid : GUID* -> "pointer"
// Buffer : LPWSTR optional, out -> "buffer"
// pulLength : DWORD* in/out -> "pointer"
// ulFlags : DWORD -> "u32"
// hMachine : INT_PTR optional -> "isize"
// 文字列は "buffer"。Unicode(-W) は new TextEncoder() ではなく UTF-16LE のバイト列(末尾に \x00\x00)を Uint8Array で渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
uint32_t CM_Get_Class_Name_ExW(
    void* ClassGuid,
    uint16_t* Buffer,
    uint32_t* pulLength,
    uint32_t ulFlags,
    intptr_t hMachine);
C, "CFGMGR32.dll");
// $ffi->CM_Get_Class_Name_ExW(ClassGuid, Buffer, pulLength, ulFlags, hMachine);
// ClassGuid : GUID*
// Buffer : LPWSTR optional, out
// pulLength : DWORD* in/out
// ulFlags : DWORD
// hMachine : INT_PTR optional
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Cfgmgr32 extends StdCallLibrary {
    Cfgmgr32 INSTANCE = Native.load("cfgmgr32", Cfgmgr32.class, W32APIOptions.UNICODE_OPTIONS);
    int CM_Get_Class_Name_ExW(
        Pointer ClassGuid,   // GUID*
        char[] Buffer,   // LPWSTR optional, out
        IntByReference pulLength,   // DWORD* in/out
        int ulFlags,   // DWORD
        long hMachine   // INT_PTR optional
    );
}
// Unicode(-W): WString(入力)/char[](出力)で UTF-16 をマーシャリング。

@[Link("cfgmgr32")]
lib LibCFGMGR32
  fun CM_Get_Class_Name_ExW = CM_Get_Class_Name_ExW(
    ClassGuid : GUID*,   # GUID*
    Buffer : UInt16*,   # LPWSTR optional, out
    pulLength : UInt32*,   # DWORD* in/out
    ulFlags : UInt32,   # DWORD
    hMachine : LibC::SSizeT   # INT_PTR optional
  ) : UInt32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef CM_Get_Class_Name_ExWNative = Uint32 Function(Pointer<Void>, Pointer<Utf16>, Pointer<Uint32>, Uint32, IntPtr);
typedef CM_Get_Class_Name_ExWDart = int Function(Pointer<Void>, Pointer<Utf16>, Pointer<Uint32>, int, int);
final CM_Get_Class_Name_ExW = DynamicLibrary.open('CFGMGR32.dll')
    .lookupFunction<CM_Get_Class_Name_ExWNative, CM_Get_Class_Name_ExWDart>('CM_Get_Class_Name_ExW');
// ClassGuid : GUID* -> Pointer<Void>
// Buffer : LPWSTR optional, out -> Pointer<Utf16>
// pulLength : DWORD* in/out -> Pointer<Uint32>
// ulFlags : DWORD -> Uint32
// hMachine : INT_PTR optional -> IntPtr
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function CM_Get_Class_Name_ExW(
  ClassGuid: PGUID;   // GUID*
  Buffer: PWideChar;   // LPWSTR optional, out
  pulLength: Pointer;   // DWORD* in/out
  ulFlags: DWORD;   // DWORD
  hMachine: NativeInt   // INT_PTR optional
): DWORD; stdcall;
  external 'CFGMGR32.dll' name 'CM_Get_Class_Name_ExW';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "CM_Get_Class_Name_ExW"
  c_CM_Get_Class_Name_ExW :: Ptr () -> CWString -> Ptr Word32 -> Word32 -> CIntPtr -> IO Word32
-- ClassGuid : GUID* -> Ptr ()
-- Buffer : LPWSTR optional, out -> CWString
-- pulLength : DWORD* in/out -> Ptr Word32
-- ulFlags : DWORD -> Word32
-- hMachine : INT_PTR optional -> CIntPtr
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let cm_get_class_name_exw =
  foreign "CM_Get_Class_Name_ExW"
    ((ptr void) @-> (ptr uint16_t) @-> (ptr uint32_t) @-> uint32_t @-> intptr_t @-> returning uint32_t)
(* ClassGuid : GUID* -> (ptr void) *)
(* Buffer : LPWSTR optional, out -> (ptr uint16_t) *)
(* pulLength : DWORD* in/out -> (ptr uint32_t) *)
(* ulFlags : DWORD -> uint32_t *)
(* hMachine : INT_PTR optional -> intptr_t *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library cfgmgr32 (t "CFGMGR32.dll"))
(cffi:use-foreign-library cfgmgr32)

(cffi:defcfun ("CM_Get_Class_Name_ExW" cm-get-class-name-ex-w :convention :stdcall) :uint32
  (class-guid :pointer)   ; GUID*
  (buffer :pointer)   ; LPWSTR optional, out
  (pul-length :pointer)   ; DWORD* in/out
  (ul-flags :uint32)   ; DWORD
  (h-machine :int64))   ; INT_PTR optional
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $CM_Get_Class_Name_ExW = Win32::API::More->new('CFGMGR32',
    'DWORD CM_Get_Class_Name_ExW(LPVOID ClassGuid, LPWSTR Buffer, LPVOID pulLength, DWORD ulFlags, LPARAM hMachine)');
# my $ret = $CM_Get_Class_Name_ExW->Call($ClassGuid, $Buffer, $pulLength, $ulFlags, $hMachine);
# ClassGuid : GUID* -> LPVOID
# Buffer : LPWSTR optional, out -> LPWSTR
# pulLength : DWORD* in/out -> LPVOID
# ulFlags : DWORD -> DWORD
# hMachine : INT_PTR optional -> LPARAM
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。
# Unicode(-W): LPCWSTR/LPWSTR は Win32::API が UTF-16 変換を行う。