PropVariantToStringAlloc

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

HRESULT PropVariantToStringAlloc(
    const PROPVARIANT* propvar,
    LPWSTR* ppszOut
);

<DllImport("PROPSYS.dll", ExactSpelling:=True)>
Public Shared Function PropVariantToStringAlloc(
    propvar As IntPtr,   ' PROPVARIANT*
    ppszOut As IntPtr   ' LPWSTR* out
) As Integer
End Function

' propvar : PROPVARIANT*
' ppszOut : LPWSTR* out
Declare PtrSafe Function PropVariantToStringAlloc Lib "propsys" ( _
    ByVal propvar As LongPtr, _
    ByVal ppszOut As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

PropVariantToStringAlloc = ctypes.windll.propsys.PropVariantToStringAlloc
PropVariantToStringAlloc.restype = ctypes.c_int
PropVariantToStringAlloc.argtypes = [
    ctypes.c_void_p,  # propvar : PROPVARIANT*
    ctypes.c_void_p,  # ppszOut : LPWSTR* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('PROPSYS.dll')
PropVariantToStringAlloc = Fiddle::Function.new(
  lib['PropVariantToStringAlloc'],
  [
    Fiddle::TYPE_VOIDP,  # propvar : PROPVARIANT*
    Fiddle::TYPE_VOIDP,  # ppszOut : LPWSTR* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "propsys")]
extern "system" {
    fn PropVariantToStringAlloc(
        propvar: *const PROPVARIANT,  // PROPVARIANT*
        ppszOut: *mut *mut u16  // LPWSTR* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("PROPSYS.dll")]
public static extern int PropVariantToStringAlloc(IntPtr propvar, IntPtr ppszOut);
"@
$api = Add-Type -MemberDefinition $sig -Name 'PROPSYS_PropVariantToStringAlloc' -Namespace Win32 -PassThru
# $api::PropVariantToStringAlloc(propvar, ppszOut)

#uselib "PROPSYS.dll"
#func global PropVariantToStringAlloc "PropVariantToStringAlloc" sptr, sptr
; PropVariantToStringAlloc varptr(propvar), varptr(ppszOut)   ; 戻り値は stat
; propvar : PROPVARIANT* -> "sptr"
; ppszOut : LPWSTR* out -> "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。

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

var (
	propsys = windows.NewLazySystemDLL("PROPSYS.dll")
	procPropVariantToStringAlloc = propsys.NewProc("PropVariantToStringAlloc")
)

// propvar (PROPVARIANT*), ppszOut (LPWSTR* out)
r1, _, err := procPropVariantToStringAlloc.Call(
	uintptr(propvar),
	uintptr(ppszOut),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function PropVariantToStringAlloc(
  propvar: Pointer;   // PROPVARIANT*
  ppszOut: PPWideChar   // LPWSTR* out
): Integer; stdcall;
  external 'PROPSYS.dll' name 'PropVariantToStringAlloc';

result := DllCall("PROPSYS\PropVariantToStringAlloc"
    , "Ptr", propvar   ; PROPVARIANT*
    , "Ptr", ppszOut   ; LPWSTR* out
    , "Int")   ; return: HRESULT

●PropVariantToStringAlloc(propvar, ppszOut) = DLL("PROPSYS.dll", "int PropVariantToStringAlloc(void*, void*)")
# 呼び出し: PropVariantToStringAlloc(propvar, ppszOut)
# propvar : PROPVARIANT* -> "void*"
# ppszOut : LPWSTR* 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)。

const std = @import("std");

extern "propsys" fn PropVariantToStringAlloc(
    propvar: [*c]PROPVARIANT, // PROPVARIANT*
    ppszOut: [*c][*c]u16 // LPWSTR* out
) callconv(std.os.windows.WINAPI) i32;

proc PropVariantToStringAlloc(
    propvar: ptr PROPVARIANT,  # PROPVARIANT*
    ppszOut: ptr WideCString  # LPWSTR* out
): int32 {.importc: "PropVariantToStringAlloc", stdcall, dynlib: "PROPSYS.dll".}

pragma(lib, "propsys");
extern(Windows)
int PropVariantToStringAlloc(
    PROPVARIANT* propvar,   // PROPVARIANT*
    wchar** ppszOut   // LPWSTR* out
);

ccall((:PropVariantToStringAlloc, "PROPSYS.dll"), stdcall, Int32,
      (Ptr{PROPVARIANT}, Ptr{Ptr{UInt16}}),
      propvar, ppszOut)
# propvar : PROPVARIANT* -> Ptr{PROPVARIANT}
# ppszOut : LPWSTR* out -> Ptr{Ptr{UInt16}}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t PropVariantToStringAlloc(
    void* propvar,
    uint16_t** ppszOut);
]]
local propsys = ffi.load("propsys")
-- propsys.PropVariantToStringAlloc(propvar, ppszOut)
-- propvar : PROPVARIANT*
-- ppszOut : LPWSTR* out
-- 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。

const koffi = require('koffi');
const lib = koffi.load('PROPSYS.dll');
const PropVariantToStringAlloc = lib.func('__stdcall', 'PropVariantToStringAlloc', 'int32_t', ['void *', 'void *']);
// PropVariantToStringAlloc(propvar, ppszOut)
// propvar : PROPVARIANT* -> 'void *'
// ppszOut : LPWSTR* out -> 'void *'
// 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("PROPSYS.dll", {
  PropVariantToStringAlloc: { parameters: ["pointer", "pointer"], result: "i32" },
});
// lib.symbols.PropVariantToStringAlloc(propvar, ppszOut)
// propvar : PROPVARIANT* -> "pointer"
// ppszOut : LPWSTR* out -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t PropVariantToStringAlloc(
    void* propvar,
    uint16_t** ppszOut);
C, "PROPSYS.dll");
// $ffi->PropVariantToStringAlloc(propvar, ppszOut);
// propvar : PROPVARIANT*
// ppszOut : LPWSTR* out
// 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 Propsys extends StdCallLibrary {
    Propsys INSTANCE = Native.load("propsys", Propsys.class);
    int PropVariantToStringAlloc(
        Pointer propvar,   // PROPVARIANT*
        PointerByReference ppszOut   // LPWSTR* out
    );
}

@[Link("propsys")]
lib LibPROPSYS
  fun PropVariantToStringAlloc = PropVariantToStringAlloc(
    propvar : PROPVARIANT*,   # PROPVARIANT*
    ppszOut : UInt16**   # LPWSTR* out
  ) : Int32
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 PropVariantToStringAllocNative = Int32 Function(Pointer<Void>, Pointer<Pointer<Utf16>>);
typedef PropVariantToStringAllocDart = int Function(Pointer<Void>, Pointer<Pointer<Utf16>>);
final PropVariantToStringAlloc = DynamicLibrary.open('PROPSYS.dll')
    .lookupFunction<PropVariantToStringAllocNative, PropVariantToStringAllocDart>('PropVariantToStringAlloc');
// propvar : PROPVARIANT* -> Pointer<Void>
// ppszOut : LPWSTR* out -> Pointer<Pointer<Utf16>>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function PropVariantToStringAlloc(
  propvar: Pointer;   // PROPVARIANT*
  ppszOut: PPWideChar   // LPWSTR* out
): Integer; stdcall;
  external 'PROPSYS.dll' name 'PropVariantToStringAlloc';

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

foreign import stdcall safe "PropVariantToStringAlloc"
  c_PropVariantToStringAlloc :: Ptr () -> Ptr CWString -> IO Int32
-- propvar : PROPVARIANT* -> Ptr ()
-- ppszOut : LPWSTR* out -> Ptr CWString
-- 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 propvarianttostringalloc =
  foreign "PropVariantToStringAlloc"
    ((ptr void) @-> (ptr (ptr uint16_t)) @-> returning int32_t)
(* propvar : PROPVARIANT* -> (ptr void) *)
(* ppszOut : LPWSTR* out -> (ptr (ptr uint16_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 propsys (t "PROPSYS.dll"))
(cffi:use-foreign-library propsys)

(cffi:defcfun ("PropVariantToStringAlloc" prop-variant-to-string-alloc :convention :stdcall) :int32
  (propvar :pointer)   ; PROPVARIANT*
  (ppsz-out :pointer))   ; LPWSTR* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $PropVariantToStringAlloc = Win32::API::More->new('PROPSYS',
    'int PropVariantToStringAlloc(LPVOID propvar, LPVOID ppszOut)');
# my $ret = $PropVariantToStringAlloc->Call($propvar, $ppszOut);
# propvar : PROPVARIANT* -> LPVOID
# ppszOut : LPWSTR* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。