MsiGetComponentPathW

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

INSTALLSTATE MsiGetComponentPathW(
    LPCWSTR szProduct,
    LPCWSTR szComponent,
    LPWSTR lpPathBuf,   // optional
    DWORD* pcchBuf   // optional
);

<DllImport("msi.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function MsiGetComponentPathW(
    <MarshalAs(UnmanagedType.LPWStr)> szProduct As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> szComponent As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> lpPathBuf As System.Text.StringBuilder,   ' LPWSTR optional, out
    pcchBuf As IntPtr   ' DWORD* optional, in/out
) As Integer
End Function

' szProduct : LPCWSTR
' szComponent : LPCWSTR
' lpPathBuf : LPWSTR optional, out
' pcchBuf : DWORD* optional, in/out
Declare PtrSafe Function MsiGetComponentPathW Lib "msi" ( _
    ByVal szProduct As LongPtr, _
    ByVal szComponent As LongPtr, _
    ByVal lpPathBuf As LongPtr, _
    ByVal pcchBuf 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

MsiGetComponentPathW = ctypes.windll.msi.MsiGetComponentPathW
MsiGetComponentPathW.restype = ctypes.c_int
MsiGetComponentPathW.argtypes = [
    wintypes.LPCWSTR,  # szProduct : LPCWSTR
    wintypes.LPCWSTR,  # szComponent : LPCWSTR
    wintypes.LPWSTR,  # lpPathBuf : LPWSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchBuf : DWORD* optional, in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('msi.dll')
MsiGetComponentPathW = Fiddle::Function.new(
  lib['MsiGetComponentPathW'],
  [
    Fiddle::TYPE_VOIDP,  # szProduct : LPCWSTR
    Fiddle::TYPE_VOIDP,  # szComponent : LPCWSTR
    Fiddle::TYPE_VOIDP,  # lpPathBuf : LPWSTR optional, out
    Fiddle::TYPE_VOIDP,  # pcchBuf : DWORD* optional, in/out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "msi")]
extern "system" {
    fn MsiGetComponentPathW(
        szProduct: *const u16,  // LPCWSTR
        szComponent: *const u16,  // LPCWSTR
        lpPathBuf: *mut u16,  // LPWSTR optional, out
        pcchBuf: *mut u32  // DWORD* optional, in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("msi.dll", CharSet = CharSet.Unicode)]
public static extern int MsiGetComponentPathW([MarshalAs(UnmanagedType.LPWStr)] string szProduct, [MarshalAs(UnmanagedType.LPWStr)] string szComponent, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpPathBuf, IntPtr pcchBuf);
"@
$api = Add-Type -MemberDefinition $sig -Name 'msi_MsiGetComponentPathW' -Namespace Win32 -PassThru
# $api::MsiGetComponentPathW(szProduct, szComponent, lpPathBuf, pcchBuf)

#uselib "msi.dll"
#func global MsiGetComponentPathW "MsiGetComponentPathW" wptr, wptr, wptr, wptr
; MsiGetComponentPathW szProduct, szComponent, varptr(lpPathBuf), varptr(pcchBuf)   ; 戻り値は stat
; szProduct : LPCWSTR -> "wptr"
; szComponent : LPCWSTR -> "wptr"
; lpPathBuf : LPWSTR optional, out -> "wptr"
; pcchBuf : DWORD* optional, in/out -> "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 (
	msi = windows.NewLazySystemDLL("msi.dll")
	procMsiGetComponentPathW = msi.NewProc("MsiGetComponentPathW")
)

// szProduct (LPCWSTR), szComponent (LPCWSTR), lpPathBuf (LPWSTR optional, out), pcchBuf (DWORD* optional, in/out)
r1, _, err := procMsiGetComponentPathW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szProduct))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szComponent))),
	uintptr(lpPathBuf),
	uintptr(pcchBuf),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INSTALLSTATE

function MsiGetComponentPathW(
  szProduct: PWideChar;   // LPCWSTR
  szComponent: PWideChar;   // LPCWSTR
  lpPathBuf: PWideChar;   // LPWSTR optional, out
  pcchBuf: Pointer   // DWORD* optional, in/out
): Integer; stdcall;
  external 'msi.dll' name 'MsiGetComponentPathW';

result := DllCall("msi\MsiGetComponentPathW"
    , "WStr", szProduct   ; LPCWSTR
    , "WStr", szComponent   ; LPCWSTR
    , "Ptr", lpPathBuf   ; LPWSTR optional, out
    , "Ptr", pcchBuf   ; DWORD* optional, in/out
    , "Int")   ; return: INSTALLSTATE

●MsiGetComponentPathW(szProduct, szComponent, lpPathBuf, pcchBuf) = DLL("msi.dll", "int MsiGetComponentPathW(char*, char*, char*, void*)")
# 呼び出し: MsiGetComponentPathW(szProduct, szComponent, lpPathBuf, pcchBuf)
# szProduct : LPCWSTR -> "char*"
# szComponent : LPCWSTR -> "char*"
# lpPathBuf : LPWSTR optional, out -> "char*"
# pcchBuf : 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)。
# ※-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 "msi" fn MsiGetComponentPathW(
    szProduct: [*c]const u16, // LPCWSTR
    szComponent: [*c]const u16, // LPCWSTR
    lpPathBuf: [*c]u16, // LPWSTR optional, out
    pcchBuf: [*c]u32 // DWORD* optional, in/out
) callconv(std.os.windows.WINAPI) i32;
// Unicode(-W): UTF-16LE のヌル終端バッファ([*c]const u16)を渡す。

proc MsiGetComponentPathW(
    szProduct: WideCString,  # LPCWSTR
    szComponent: WideCString,  # LPCWSTR
    lpPathBuf: ptr uint16,  # LPWSTR optional, out
    pcchBuf: ptr uint32  # DWORD* optional, in/out
): int32 {.importc: "MsiGetComponentPathW", stdcall, dynlib: "msi.dll".}
# Unicode(-W): WideCString は newWideCString("...") で生成。

pragma(lib, "msi");
extern(Windows)
int MsiGetComponentPathW(
    const(wchar)* szProduct,   // LPCWSTR
    const(wchar)* szComponent,   // LPCWSTR
    wchar* lpPathBuf,   // LPWSTR optional, out
    uint* pcchBuf   // DWORD* optional, in/out
);

ccall((:MsiGetComponentPathW, "msi.dll"), stdcall, Int32,
      (Cwstring, Cwstring, Ptr{UInt16}, Ptr{UInt32}),
      szProduct, szComponent, lpPathBuf, pcchBuf)
# szProduct : LPCWSTR -> Cwstring
# szComponent : LPCWSTR -> Cwstring
# lpPathBuf : LPWSTR optional, out -> Ptr{UInt16}
# pcchBuf : DWORD* optional, in/out -> Ptr{UInt32}
# 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[[
int32_t MsiGetComponentPathW(
    const uint16_t* szProduct,
    const uint16_t* szComponent,
    uint16_t* lpPathBuf,
    uint32_t* pcchBuf);
]]
local msi = ffi.load("msi")
-- msi.MsiGetComponentPathW(szProduct, szComponent, lpPathBuf, pcchBuf)
-- szProduct : LPCWSTR
-- szComponent : LPCWSTR
-- lpPathBuf : LPWSTR optional, out
-- pcchBuf : 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。
-- 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('msi.dll');
const MsiGetComponentPathW = lib.func('__stdcall', 'MsiGetComponentPathW', 'int32_t', ['str16', 'str16', 'uint16_t *', 'uint32_t *']);
// MsiGetComponentPathW(szProduct, szComponent, lpPathBuf, pcchBuf)
// szProduct : LPCWSTR -> 'str16'
// szComponent : LPCWSTR -> 'str16'
// lpPathBuf : LPWSTR optional, out -> 'uint16_t *'
// pcchBuf : 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("msi.dll", {
  MsiGetComponentPathW: { parameters: ["buffer", "buffer", "buffer", "pointer"], result: "i32" },
});
// lib.symbols.MsiGetComponentPathW(szProduct, szComponent, lpPathBuf, pcchBuf)
// szProduct : LPCWSTR -> "buffer"
// szComponent : LPCWSTR -> "buffer"
// lpPathBuf : LPWSTR optional, out -> "buffer"
// pcchBuf : DWORD* optional, in/out -> "pointer"
// 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
int32_t MsiGetComponentPathW(
    const uint16_t* szProduct,
    const uint16_t* szComponent,
    uint16_t* lpPathBuf,
    uint32_t* pcchBuf);
C, "msi.dll");
// $ffi->MsiGetComponentPathW(szProduct, szComponent, lpPathBuf, pcchBuf);
// szProduct : LPCWSTR
// szComponent : LPCWSTR
// lpPathBuf : LPWSTR optional, out
// pcchBuf : 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 Msi extends StdCallLibrary {
    Msi INSTANCE = Native.load("msi", Msi.class, W32APIOptions.UNICODE_OPTIONS);
    int MsiGetComponentPathW(
        WString szProduct,   // LPCWSTR
        WString szComponent,   // LPCWSTR
        char[] lpPathBuf,   // LPWSTR optional, out
        IntByReference pcchBuf   // DWORD* optional, in/out
    );
}
// Unicode(-W): WString(入力)/char[](出力)で UTF-16 をマーシャリング。

@[Link("msi")]
lib Libmsi
  fun MsiGetComponentPathW = MsiGetComponentPathW(
    szProduct : UInt16*,   # LPCWSTR
    szComponent : UInt16*,   # LPCWSTR
    lpPathBuf : UInt16*,   # LPWSTR optional, out
    pcchBuf : UInt32*   # DWORD* optional, in/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 MsiGetComponentPathWNative = Int32 Function(Pointer<Utf16>, Pointer<Utf16>, Pointer<Utf16>, Pointer<Uint32>);
typedef MsiGetComponentPathWDart = int Function(Pointer<Utf16>, Pointer<Utf16>, Pointer<Utf16>, Pointer<Uint32>);
final MsiGetComponentPathW = DynamicLibrary.open('msi.dll')
    .lookupFunction<MsiGetComponentPathWNative, MsiGetComponentPathWDart>('MsiGetComponentPathW');
// szProduct : LPCWSTR -> Pointer<Utf16>
// szComponent : LPCWSTR -> Pointer<Utf16>
// lpPathBuf : LPWSTR optional, out -> Pointer<Utf16>
// pcchBuf : DWORD* optional, in/out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function MsiGetComponentPathW(
  szProduct: PWideChar;   // LPCWSTR
  szComponent: PWideChar;   // LPCWSTR
  lpPathBuf: PWideChar;   // LPWSTR optional, out
  pcchBuf: Pointer   // DWORD* optional, in/out
): Integer; stdcall;
  external 'msi.dll' name 'MsiGetComponentPathW';

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

foreign import stdcall safe "MsiGetComponentPathW"
  c_MsiGetComponentPathW :: CWString -> CWString -> CWString -> Ptr Word32 -> IO Int32
-- szProduct : LPCWSTR -> CWString
-- szComponent : LPCWSTR -> CWString
-- lpPathBuf : LPWSTR optional, out -> CWString
-- pcchBuf : 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 msigetcomponentpathw =
  foreign "MsiGetComponentPathW"
    ((ptr uint16_t) @-> (ptr uint16_t) @-> (ptr uint16_t) @-> (ptr uint32_t) @-> returning int32_t)
(* szProduct : LPCWSTR -> (ptr uint16_t) *)
(* szComponent : LPCWSTR -> (ptr uint16_t) *)
(* lpPathBuf : LPWSTR optional, out -> (ptr uint16_t) *)
(* pcchBuf : 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 msi (t "msi.dll"))
(cffi:use-foreign-library msi)

(cffi:defcfun ("MsiGetComponentPathW" msi-get-component-path-w :convention :stdcall) :int32
  (sz-product (:string :encoding :utf-16le))   ; LPCWSTR
  (sz-component (:string :encoding :utf-16le))   ; LPCWSTR
  (lp-path-buf :pointer)   ; LPWSTR optional, out
  (pcch-buf :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 $MsiGetComponentPathW = Win32::API::More->new('msi',
    'int MsiGetComponentPathW(LPCWSTR szProduct, LPCWSTR szComponent, LPWSTR lpPathBuf, LPVOID pcchBuf)');
# my $ret = $MsiGetComponentPathW->Call($szProduct, $szComponent, $lpPathBuf, $pcchBuf);
# szProduct : LPCWSTR -> LPCWSTR
# szComponent : LPCWSTR -> LPCWSTR
# lpPathBuf : LPWSTR optional, out -> LPWSTR
# pcchBuf : 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。
# Unicode(-W): LPCWSTR/LPWSTR は Win32::API が UTF-16 変換を行う。