SLGetReferralInformation

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

HRESULT SLGetReferralInformation(
    void* hSLC,
    SLREFERRALTYPE eReferralType,
    const GUID* pSkuOrAppId,
    LPCWSTR pwszValueName,
    LPWSTR* ppwszValue
);

<DllImport("slcext.dll", ExactSpelling:=True)>
Public Shared Function SLGetReferralInformation(
    hSLC As IntPtr,   ' void*
    eReferralType As Integer,   ' SLREFERRALTYPE
    ByRef pSkuOrAppId As Guid,   ' GUID*
    <MarshalAs(UnmanagedType.LPWStr)> pwszValueName As String,   ' LPCWSTR
    ppwszValue As IntPtr   ' LPWSTR* out
) As Integer
End Function

' hSLC : void*
' eReferralType : SLREFERRALTYPE
' pSkuOrAppId : GUID*
' pwszValueName : LPCWSTR
' ppwszValue : LPWSTR* out
Declare PtrSafe Function SLGetReferralInformation Lib "slcext" ( _
    ByVal hSLC As LongPtr, _
    ByVal eReferralType As Long, _
    ByVal pSkuOrAppId As LongPtr, _
    ByVal pwszValueName As LongPtr, _
    ByVal ppwszValue 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

SLGetReferralInformation = ctypes.windll.slcext.SLGetReferralInformation
SLGetReferralInformation.restype = ctypes.c_int
SLGetReferralInformation.argtypes = [
    ctypes.POINTER(None),  # hSLC : void*
    ctypes.c_int,  # eReferralType : SLREFERRALTYPE
    ctypes.c_void_p,  # pSkuOrAppId : GUID*
    wintypes.LPCWSTR,  # pwszValueName : LPCWSTR
    ctypes.c_void_p,  # ppwszValue : LPWSTR* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('slcext.dll')
SLGetReferralInformation = Fiddle::Function.new(
  lib['SLGetReferralInformation'],
  [
    Fiddle::TYPE_VOIDP,  # hSLC : void*
    Fiddle::TYPE_INT,  # eReferralType : SLREFERRALTYPE
    Fiddle::TYPE_VOIDP,  # pSkuOrAppId : GUID*
    Fiddle::TYPE_VOIDP,  # pwszValueName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # ppwszValue : LPWSTR* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "slcext")]
extern "system" {
    fn SLGetReferralInformation(
        hSLC: *mut (),  // void*
        eReferralType: i32,  // SLREFERRALTYPE
        pSkuOrAppId: *const GUID,  // GUID*
        pwszValueName: *const u16,  // LPCWSTR
        ppwszValue: *mut *mut u16  // LPWSTR* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("slcext.dll")]
public static extern int SLGetReferralInformation(IntPtr hSLC, int eReferralType, ref Guid pSkuOrAppId, [MarshalAs(UnmanagedType.LPWStr)] string pwszValueName, IntPtr ppwszValue);
"@
$api = Add-Type -MemberDefinition $sig -Name 'slcext_SLGetReferralInformation' -Namespace Win32 -PassThru
# $api::SLGetReferralInformation(hSLC, eReferralType, pSkuOrAppId, pwszValueName, ppwszValue)

#uselib "slcext.dll"
#func global SLGetReferralInformation "SLGetReferralInformation" sptr, sptr, sptr, sptr, sptr
; SLGetReferralInformation hSLC, eReferralType, varptr(pSkuOrAppId), pwszValueName, varptr(ppwszValue)   ; 戻り値は stat
; hSLC : void* -> "sptr"
; eReferralType : SLREFERRALTYPE -> "sptr"
; pSkuOrAppId : GUID* -> "sptr"
; pwszValueName : LPCWSTR -> "sptr"
; ppwszValue : 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 (
	slcext = windows.NewLazySystemDLL("slcext.dll")
	procSLGetReferralInformation = slcext.NewProc("SLGetReferralInformation")
)

// hSLC (void*), eReferralType (SLREFERRALTYPE), pSkuOrAppId (GUID*), pwszValueName (LPCWSTR), ppwszValue (LPWSTR* out)
r1, _, err := procSLGetReferralInformation.Call(
	uintptr(hSLC),
	uintptr(eReferralType),
	uintptr(pSkuOrAppId),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwszValueName))),
	uintptr(ppwszValue),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function SLGetReferralInformation(
  hSLC: Pointer;   // void*
  eReferralType: Integer;   // SLREFERRALTYPE
  pSkuOrAppId: PGUID;   // GUID*
  pwszValueName: PWideChar;   // LPCWSTR
  ppwszValue: PPWideChar   // LPWSTR* out
): Integer; stdcall;
  external 'slcext.dll' name 'SLGetReferralInformation';

result := DllCall("slcext\SLGetReferralInformation"
    , "Ptr", hSLC   ; void*
    , "Int", eReferralType   ; SLREFERRALTYPE
    , "Ptr", pSkuOrAppId   ; GUID*
    , "WStr", pwszValueName   ; LPCWSTR
    , "Ptr", ppwszValue   ; LPWSTR* out
    , "Int")   ; return: HRESULT

●SLGetReferralInformation(hSLC, eReferralType, pSkuOrAppId, pwszValueName, ppwszValue) = DLL("slcext.dll", "int SLGetReferralInformation(void*, int, void*, char*, void*)")
# 呼び出し: SLGetReferralInformation(hSLC, eReferralType, pSkuOrAppId, pwszValueName, ppwszValue)
# hSLC : void* -> "void*"
# eReferralType : SLREFERRALTYPE -> "int"
# pSkuOrAppId : GUID* -> "void*"
# pwszValueName : LPCWSTR -> "char*"
# ppwszValue : 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 "slcext" fn SLGetReferralInformation(
    hSLC: ?*anyopaque, // void*
    eReferralType: i32, // SLREFERRALTYPE
    pSkuOrAppId: [*c]GUID, // GUID*
    pwszValueName: [*c]const u16, // LPCWSTR
    ppwszValue: [*c][*c]u16 // LPWSTR* out
) callconv(std.os.windows.WINAPI) i32;

proc SLGetReferralInformation(
    hSLC: pointer,  # void*
    eReferralType: int32,  # SLREFERRALTYPE
    pSkuOrAppId: ptr GUID,  # GUID*
    pwszValueName: WideCString,  # LPCWSTR
    ppwszValue: ptr WideCString  # LPWSTR* out
): int32 {.importc: "SLGetReferralInformation", stdcall, dynlib: "slcext.dll".}

pragma(lib, "slcext");
extern(Windows)
int SLGetReferralInformation(
    void* hSLC,   // void*
    int eReferralType,   // SLREFERRALTYPE
    GUID* pSkuOrAppId,   // GUID*
    const(wchar)* pwszValueName,   // LPCWSTR
    wchar** ppwszValue   // LPWSTR* out
);

ccall((:SLGetReferralInformation, "slcext.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Int32, Ptr{GUID}, Cwstring, Ptr{Ptr{UInt16}}),
      hSLC, eReferralType, pSkuOrAppId, pwszValueName, ppwszValue)
# hSLC : void* -> Ptr{Cvoid}
# eReferralType : SLREFERRALTYPE -> Int32
# pSkuOrAppId : GUID* -> Ptr{GUID}
# pwszValueName : LPCWSTR -> Cwstring
# ppwszValue : 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 SLGetReferralInformation(
    void* hSLC,
    int32_t eReferralType,
    void* pSkuOrAppId,
    const uint16_t* pwszValueName,
    uint16_t** ppwszValue);
]]
local slcext = ffi.load("slcext")
-- slcext.SLGetReferralInformation(hSLC, eReferralType, pSkuOrAppId, pwszValueName, ppwszValue)
-- hSLC : void*
-- eReferralType : SLREFERRALTYPE
-- pSkuOrAppId : GUID*
-- pwszValueName : LPCWSTR
-- ppwszValue : 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('slcext.dll');
const SLGetReferralInformation = lib.func('__stdcall', 'SLGetReferralInformation', 'int32_t', ['void *', 'int32_t', 'void *', 'str16', 'void *']);
// SLGetReferralInformation(hSLC, eReferralType, pSkuOrAppId, pwszValueName, ppwszValue)
// hSLC : void* -> 'void *'
// eReferralType : SLREFERRALTYPE -> 'int32_t'
// pSkuOrAppId : GUID* -> 'void *'
// pwszValueName : LPCWSTR -> 'str16'
// ppwszValue : 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("slcext.dll", {
  SLGetReferralInformation: { parameters: ["pointer", "i32", "pointer", "buffer", "pointer"], result: "i32" },
});
// lib.symbols.SLGetReferralInformation(hSLC, eReferralType, pSkuOrAppId, pwszValueName, ppwszValue)
// hSLC : void* -> "pointer"
// eReferralType : SLREFERRALTYPE -> "i32"
// pSkuOrAppId : GUID* -> "pointer"
// pwszValueName : LPCWSTR -> "buffer"
// ppwszValue : 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 SLGetReferralInformation(
    void* hSLC,
    int32_t eReferralType,
    void* pSkuOrAppId,
    const uint16_t* pwszValueName,
    uint16_t** ppwszValue);
C, "slcext.dll");
// $ffi->SLGetReferralInformation(hSLC, eReferralType, pSkuOrAppId, pwszValueName, ppwszValue);
// hSLC : void*
// eReferralType : SLREFERRALTYPE
// pSkuOrAppId : GUID*
// pwszValueName : LPCWSTR
// ppwszValue : 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 Slcext extends StdCallLibrary {
    Slcext INSTANCE = Native.load("slcext", Slcext.class);
    int SLGetReferralInformation(
        Pointer hSLC,   // void*
        int eReferralType,   // SLREFERRALTYPE
        Pointer pSkuOrAppId,   // GUID*
        WString pwszValueName,   // LPCWSTR
        PointerByReference ppwszValue   // LPWSTR* out
    );
}

@[Link("slcext")]
lib Libslcext
  fun SLGetReferralInformation = SLGetReferralInformation(
    hSLC : Void*,   # void*
    eReferralType : Int32,   # SLREFERRALTYPE
    pSkuOrAppId : GUID*,   # GUID*
    pwszValueName : UInt16*,   # LPCWSTR
    ppwszValue : 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 SLGetReferralInformationNative = Int32 Function(Pointer<Void>, Int32, Pointer<Void>, Pointer<Utf16>, Pointer<Pointer<Utf16>>);
typedef SLGetReferralInformationDart = int Function(Pointer<Void>, int, Pointer<Void>, Pointer<Utf16>, Pointer<Pointer<Utf16>>);
final SLGetReferralInformation = DynamicLibrary.open('slcext.dll')
    .lookupFunction<SLGetReferralInformationNative, SLGetReferralInformationDart>('SLGetReferralInformation');
// hSLC : void* -> Pointer<Void>
// eReferralType : SLREFERRALTYPE -> Int32
// pSkuOrAppId : GUID* -> Pointer<Void>
// pwszValueName : LPCWSTR -> Pointer<Utf16>
// ppwszValue : LPWSTR* out -> Pointer<Pointer<Utf16>>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function SLGetReferralInformation(
  hSLC: Pointer;   // void*
  eReferralType: Integer;   // SLREFERRALTYPE
  pSkuOrAppId: PGUID;   // GUID*
  pwszValueName: PWideChar;   // LPCWSTR
  ppwszValue: PPWideChar   // LPWSTR* out
): Integer; stdcall;
  external 'slcext.dll' name 'SLGetReferralInformation';

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

foreign import stdcall safe "SLGetReferralInformation"
  c_SLGetReferralInformation :: Ptr () -> Int32 -> Ptr () -> CWString -> Ptr CWString -> IO Int32
-- hSLC : void* -> Ptr ()
-- eReferralType : SLREFERRALTYPE -> Int32
-- pSkuOrAppId : GUID* -> Ptr ()
-- pwszValueName : LPCWSTR -> CWString
-- ppwszValue : 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 slgetreferralinformation =
  foreign "SLGetReferralInformation"
    ((ptr void) @-> int32_t @-> (ptr void) @-> (ptr uint16_t) @-> (ptr (ptr uint16_t)) @-> returning int32_t)
(* hSLC : void* -> (ptr void) *)
(* eReferralType : SLREFERRALTYPE -> int32_t *)
(* pSkuOrAppId : GUID* -> (ptr void) *)
(* pwszValueName : LPCWSTR -> (ptr uint16_t) *)
(* ppwszValue : 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 slcext (t "slcext.dll"))
(cffi:use-foreign-library slcext)

(cffi:defcfun ("SLGetReferralInformation" slget-referral-information :convention :stdcall) :int32
  (h-slc :pointer)   ; void*
  (e-referral-type :int32)   ; SLREFERRALTYPE
  (p-sku-or-app-id :pointer)   ; GUID*
  (pwsz-value-name (:string :encoding :utf-16le))   ; LPCWSTR
  (ppwsz-value :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 $SLGetReferralInformation = Win32::API::More->new('slcext',
    'int SLGetReferralInformation(LPVOID hSLC, int eReferralType, LPVOID pSkuOrAppId, LPCWSTR pwszValueName, LPVOID ppwszValue)');
# my $ret = $SLGetReferralInformation->Call($hSLC, $eReferralType, $pSkuOrAppId, $pwszValueName, $ppwszValue);
# hSLC : void* -> LPVOID
# eReferralType : SLREFERRALTYPE -> int
# pSkuOrAppId : GUID* -> LPVOID
# pwszValueName : LPCWSTR -> LPCWSTR
# ppwszValue : 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。