SHGetValueA

// SHLWAPI.dll  (ANSI / -A)
#include <windows.h>

WIN32_ERROR SHGetValueA(
    HKEY hkey,
    LPCSTR pszSubKey,   // optional
    LPCSTR pszValue,   // optional
    DWORD* pdwType,   // optional
    void* pvData,   // optional
    DWORD* pcbData   // optional
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SHGetValueA(
    hkey As IntPtr,   ' HKEY
    <MarshalAs(UnmanagedType.LPStr)> pszSubKey As String,   ' LPCSTR optional
    <MarshalAs(UnmanagedType.LPStr)> pszValue As String,   ' LPCSTR optional
    pdwType As IntPtr,   ' DWORD* optional, out
    pvData As IntPtr,   ' void* optional, out
    pcbData As IntPtr   ' DWORD* optional, in/out
) As UInteger
End Function

' hkey : HKEY
' pszSubKey : LPCSTR optional
' pszValue : LPCSTR optional
' pdwType : DWORD* optional, out
' pvData : void* optional, out
' pcbData : DWORD* optional, in/out
Declare PtrSafe Function SHGetValueA Lib "shlwapi" ( _
    ByVal hkey As LongPtr, _
    ByVal pszSubKey As String, _
    ByVal pszValue As String, _
    ByVal pdwType As LongPtr, _
    ByVal pvData As LongPtr, _
    ByVal pcbData 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

SHGetValueA = ctypes.windll.shlwapi.SHGetValueA
SHGetValueA.restype = wintypes.DWORD
SHGetValueA.argtypes = [
    wintypes.HANDLE,  # hkey : HKEY
    wintypes.LPCSTR,  # pszSubKey : LPCSTR optional
    wintypes.LPCSTR,  # pszValue : LPCSTR optional
    ctypes.POINTER(wintypes.DWORD),  # pdwType : DWORD* optional, out
    ctypes.POINTER(None),  # pvData : void* optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcbData : DWORD* optional, in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
SHGetValueA = Fiddle::Function.new(
  lib['SHGetValueA'],
  [
    Fiddle::TYPE_VOIDP,  # hkey : HKEY
    Fiddle::TYPE_VOIDP,  # pszSubKey : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # pszValue : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # pdwType : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # pvData : void* optional, out
    Fiddle::TYPE_VOIDP,  # pcbData : DWORD* optional, in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "shlwapi")]
extern "system" {
    fn SHGetValueA(
        hkey: *mut core::ffi::c_void,  // HKEY
        pszSubKey: *const u8,  // LPCSTR optional
        pszValue: *const u8,  // LPCSTR optional
        pdwType: *mut u32,  // DWORD* optional, out
        pvData: *mut (),  // void* optional, out
        pcbData: *mut u32  // DWORD* optional, in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll", CharSet = CharSet.Ansi)]
public static extern uint SHGetValueA(IntPtr hkey, [MarshalAs(UnmanagedType.LPStr)] string pszSubKey, [MarshalAs(UnmanagedType.LPStr)] string pszValue, IntPtr pdwType, IntPtr pvData, IntPtr pcbData);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_SHGetValueA' -Namespace Win32 -PassThru
# $api::SHGetValueA(hkey, pszSubKey, pszValue, pdwType, pvData, pcbData)

#uselib "SHLWAPI.dll"
#func global SHGetValueA "SHGetValueA" sptr, sptr, sptr, sptr, sptr, sptr
; SHGetValueA hkey, pszSubKey, pszValue, varptr(pdwType), pvData, varptr(pcbData)   ; 戻り値は stat
; hkey : HKEY -> "sptr"
; pszSubKey : LPCSTR optional -> "sptr"
; pszValue : LPCSTR optional -> "sptr"
; pdwType : DWORD* optional, out -> "sptr"
; pvData : void* optional, out -> "sptr"
; pcbData : DWORD* optional, in/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 (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procSHGetValueA = shlwapi.NewProc("SHGetValueA")
)

// hkey (HKEY), pszSubKey (LPCSTR optional), pszValue (LPCSTR optional), pdwType (DWORD* optional, out), pvData (void* optional, out), pcbData (DWORD* optional, in/out)
r1, _, err := procSHGetValueA.Call(
	uintptr(hkey),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszSubKey))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszValue))),
	uintptr(pdwType),
	uintptr(pvData),
	uintptr(pcbData),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function SHGetValueA(
  hkey: THandle;   // HKEY
  pszSubKey: PAnsiChar;   // LPCSTR optional
  pszValue: PAnsiChar;   // LPCSTR optional
  pdwType: Pointer;   // DWORD* optional, out
  pvData: Pointer;   // void* optional, out
  pcbData: Pointer   // DWORD* optional, in/out
): DWORD; stdcall;
  external 'SHLWAPI.dll' name 'SHGetValueA';

result := DllCall("SHLWAPI\SHGetValueA"
    , "Ptr", hkey   ; HKEY
    , "AStr", pszSubKey   ; LPCSTR optional
    , "AStr", pszValue   ; LPCSTR optional
    , "Ptr", pdwType   ; DWORD* optional, out
    , "Ptr", pvData   ; void* optional, out
    , "Ptr", pcbData   ; DWORD* optional, in/out
    , "UInt")   ; return: WIN32_ERROR

●SHGetValueA(hkey, pszSubKey, pszValue, pdwType, pvData, pcbData) = DLL("SHLWAPI.dll", "dword SHGetValueA(void*, char*, char*, void*, void*, void*)")
# 呼び出し: SHGetValueA(hkey, pszSubKey, pszValue, pdwType, pvData, pcbData)
# hkey : HKEY -> "void*"
# pszSubKey : LPCSTR optional -> "char*"
# pszValue : LPCSTR optional -> "char*"
# pdwType : DWORD* optional, out -> "void*"
# pvData : void* optional, out -> "void*"
# pcbData : DWORD* optional, in/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 "shlwapi" fn SHGetValueA(
    hkey: ?*anyopaque, // HKEY
    pszSubKey: [*c]const u8, // LPCSTR optional
    pszValue: [*c]const u8, // LPCSTR optional
    pdwType: [*c]u32, // DWORD* optional, out
    pvData: ?*anyopaque, // void* optional, out
    pcbData: [*c]u32 // DWORD* optional, in/out
) callconv(std.os.windows.WINAPI) u32;

proc SHGetValueA(
    hkey: pointer,  # HKEY
    pszSubKey: cstring,  # LPCSTR optional
    pszValue: cstring,  # LPCSTR optional
    pdwType: ptr uint32,  # DWORD* optional, out
    pvData: pointer,  # void* optional, out
    pcbData: ptr uint32  # DWORD* optional, in/out
): uint32 {.importc: "SHGetValueA", stdcall, dynlib: "SHLWAPI.dll".}

pragma(lib, "shlwapi");
extern(Windows)
uint SHGetValueA(
    void* hkey,   // HKEY
    const(char)* pszSubKey,   // LPCSTR optional
    const(char)* pszValue,   // LPCSTR optional
    uint* pdwType,   // DWORD* optional, out
    void* pvData,   // void* optional, out
    uint* pcbData   // DWORD* optional, in/out
);

ccall((:SHGetValueA, "SHLWAPI.dll"), stdcall, UInt32,
      (Ptr{Cvoid}, Cstring, Cstring, Ptr{UInt32}, Ptr{Cvoid}, Ptr{UInt32}),
      hkey, pszSubKey, pszValue, pdwType, pvData, pcbData)
# hkey : HKEY -> Ptr{Cvoid}
# pszSubKey : LPCSTR optional -> Cstring
# pszValue : LPCSTR optional -> Cstring
# pdwType : DWORD* optional, out -> Ptr{UInt32}
# pvData : void* optional, out -> Ptr{Cvoid}
# pcbData : DWORD* optional, in/out -> Ptr{UInt32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t SHGetValueA(
    void* hkey,
    const char* pszSubKey,
    const char* pszValue,
    uint32_t* pdwType,
    void* pvData,
    uint32_t* pcbData);
]]
local shlwapi = ffi.load("shlwapi")
-- shlwapi.SHGetValueA(hkey, pszSubKey, pszValue, pdwType, pvData, pcbData)
-- hkey : HKEY
-- pszSubKey : LPCSTR optional
-- pszValue : LPCSTR optional
-- pdwType : DWORD* optional, out
-- pvData : void* optional, out
-- pcbData : DWORD* optional, in/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('SHLWAPI.dll');
const SHGetValueA = lib.func('__stdcall', 'SHGetValueA', 'uint32_t', ['void *', 'str', 'str', 'uint32_t *', 'void *', 'uint32_t *']);
// SHGetValueA(hkey, pszSubKey, pszValue, pdwType, pvData, pcbData)
// hkey : HKEY -> 'void *'
// pszSubKey : LPCSTR optional -> 'str'
// pszValue : LPCSTR optional -> 'str'
// pdwType : DWORD* optional, out -> 'uint32_t *'
// pvData : void* optional, out -> 'void *'
// pcbData : DWORD* optional, in/out -> 'uint32_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("SHLWAPI.dll", {
  SHGetValueA: { parameters: ["pointer", "buffer", "buffer", "pointer", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.SHGetValueA(hkey, pszSubKey, pszValue, pdwType, pvData, pcbData)
// hkey : HKEY -> "pointer"
// pszSubKey : LPCSTR optional -> "buffer"
// pszValue : LPCSTR optional -> "buffer"
// pdwType : DWORD* optional, out -> "pointer"
// pvData : void* optional, out -> "pointer"
// pcbData : DWORD* optional, in/out -> "pointer"
// 文字列は "buffer"。ANSI(-A) は new TextEncoder() で UTF-8/ANSI バイト列(末尾に \x00)を渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
uint32_t SHGetValueA(
    void* hkey,
    const char* pszSubKey,
    const char* pszValue,
    uint32_t* pdwType,
    void* pvData,
    uint32_t* pcbData);
C, "SHLWAPI.dll");
// $ffi->SHGetValueA(hkey, pszSubKey, pszValue, pdwType, pvData, pcbData);
// hkey : HKEY
// pszSubKey : LPCSTR optional
// pszValue : LPCSTR optional
// pdwType : DWORD* optional, out
// pvData : void* optional, out
// pcbData : DWORD* optional, in/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 Shlwapi extends StdCallLibrary {
    Shlwapi INSTANCE = Native.load("shlwapi", Shlwapi.class, W32APIOptions.ASCII_OPTIONS);
    int SHGetValueA(
        Pointer hkey,   // HKEY
        String pszSubKey,   // LPCSTR optional
        String pszValue,   // LPCSTR optional
        IntByReference pdwType,   // DWORD* optional, out
        Pointer pvData,   // void* optional, out
        IntByReference pcbData   // DWORD* optional, in/out
    );
}

@[Link("shlwapi")]
lib LibSHLWAPI
  fun SHGetValueA = SHGetValueA(
    hkey : Void*,   # HKEY
    pszSubKey : UInt8*,   # LPCSTR optional
    pszValue : UInt8*,   # LPCSTR optional
    pdwType : UInt32*,   # DWORD* optional, out
    pvData : Void*,   # void* optional, out
    pcbData : UInt32*   # DWORD* optional, in/out
  ) : 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 SHGetValueANative = Uint32 Function(Pointer<Void>, Pointer<Utf8>, Pointer<Utf8>, Pointer<Uint32>, Pointer<Void>, Pointer<Uint32>);
typedef SHGetValueADart = int Function(Pointer<Void>, Pointer<Utf8>, Pointer<Utf8>, Pointer<Uint32>, Pointer<Void>, Pointer<Uint32>);
final SHGetValueA = DynamicLibrary.open('SHLWAPI.dll')
    .lookupFunction<SHGetValueANative, SHGetValueADart>('SHGetValueA');
// hkey : HKEY -> Pointer<Void>
// pszSubKey : LPCSTR optional -> Pointer<Utf8>
// pszValue : LPCSTR optional -> Pointer<Utf8>
// pdwType : DWORD* optional, out -> Pointer<Uint32>
// pvData : void* optional, out -> Pointer<Void>
// pcbData : DWORD* optional, in/out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function SHGetValueA(
  hkey: THandle;   // HKEY
  pszSubKey: PAnsiChar;   // LPCSTR optional
  pszValue: PAnsiChar;   // LPCSTR optional
  pdwType: Pointer;   // DWORD* optional, out
  pvData: Pointer;   // void* optional, out
  pcbData: Pointer   // DWORD* optional, in/out
): DWORD; stdcall;
  external 'SHLWAPI.dll' name 'SHGetValueA';

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

foreign import stdcall safe "SHGetValueA"
  c_SHGetValueA :: Ptr () -> CString -> CString -> Ptr Word32 -> Ptr () -> Ptr Word32 -> IO Word32
-- hkey : HKEY -> Ptr ()
-- pszSubKey : LPCSTR optional -> CString
-- pszValue : LPCSTR optional -> CString
-- pdwType : DWORD* optional, out -> Ptr Word32
-- pvData : void* optional, out -> Ptr ()
-- pcbData : DWORD* optional, in/out -> Ptr Word32
-- 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 shgetvaluea =
  foreign "SHGetValueA"
    ((ptr void) @-> string @-> string @-> (ptr uint32_t) @-> (ptr void) @-> (ptr uint32_t) @-> returning uint32_t)
(* hkey : HKEY -> (ptr void) *)
(* pszSubKey : LPCSTR optional -> string *)
(* pszValue : LPCSTR optional -> string *)
(* pdwType : DWORD* optional, out -> (ptr uint32_t) *)
(* pvData : void* optional, out -> (ptr void) *)
(* pcbData : DWORD* optional, in/out -> (ptr uint32_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 shlwapi (t "SHLWAPI.dll"))
(cffi:use-foreign-library shlwapi)

(cffi:defcfun ("SHGetValueA" shget-value-a :convention :stdcall) :uint32
  (hkey :pointer)   ; HKEY
  (psz-sub-key :string)   ; LPCSTR optional
  (psz-value :string)   ; LPCSTR optional
  (pdw-type :pointer)   ; DWORD* optional, out
  (pv-data :pointer)   ; void* optional, out
  (pcb-data :pointer))   ; DWORD* optional, in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $SHGetValueA = Win32::API::More->new('SHLWAPI',
    'DWORD SHGetValueA(HANDLE hkey, LPCSTR pszSubKey, LPCSTR pszValue, LPVOID pdwType, LPVOID pvData, LPVOID pcbData)');
# my $ret = $SHGetValueA->Call($hkey, $pszSubKey, $pszValue, $pdwType, $pvData, $pcbData);
# hkey : HKEY -> HANDLE
# pszSubKey : LPCSTR optional -> LPCSTR
# pszValue : LPCSTR optional -> LPCSTR
# pdwType : DWORD* optional, out -> LPVOID
# pvData : void* optional, out -> LPVOID
# pcbData : DWORD* optional, in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。