NPGetUser

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

DWORD NPGetUser(
    LPWSTR lpName,
    LPWSTR lpUserName,
    DWORD* lpnBufferLen
);

<DllImport("davclnt.dll", ExactSpelling:=True)>
Public Shared Function NPGetUser(
    <MarshalAs(UnmanagedType.LPWStr)> lpName As String,   ' LPWSTR
    <MarshalAs(UnmanagedType.LPWStr)> lpUserName As System.Text.StringBuilder,   ' LPWSTR out
    ByRef lpnBufferLen As UInteger   ' DWORD* in/out
) As UInteger
End Function

' lpName : LPWSTR
' lpUserName : LPWSTR out
' lpnBufferLen : DWORD* in/out
Declare PtrSafe Function NPGetUser Lib "davclnt" ( _
    ByVal lpName As LongPtr, _
    ByVal lpUserName As LongPtr, _
    ByRef lpnBufferLen As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

NPGetUser = ctypes.windll.davclnt.NPGetUser
NPGetUser.restype = wintypes.DWORD
NPGetUser.argtypes = [
    wintypes.LPCWSTR,  # lpName : LPWSTR
    wintypes.LPWSTR,  # lpUserName : LPWSTR out
    ctypes.POINTER(wintypes.DWORD),  # lpnBufferLen : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('davclnt.dll')
NPGetUser = Fiddle::Function.new(
  lib['NPGetUser'],
  [
    Fiddle::TYPE_VOIDP,  # lpName : LPWSTR
    Fiddle::TYPE_VOIDP,  # lpUserName : LPWSTR out
    Fiddle::TYPE_VOIDP,  # lpnBufferLen : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "davclnt")]
extern "system" {
    fn NPGetUser(
        lpName: *mut u16,  // LPWSTR
        lpUserName: *mut u16,  // LPWSTR out
        lpnBufferLen: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("davclnt.dll")]
public static extern uint NPGetUser([MarshalAs(UnmanagedType.LPWStr)] string lpName, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpUserName, ref uint lpnBufferLen);
"@
$api = Add-Type -MemberDefinition $sig -Name 'davclnt_NPGetUser' -Namespace Win32 -PassThru
# $api::NPGetUser(lpName, lpUserName, lpnBufferLen)

#uselib "davclnt.dll"
#func global NPGetUser "NPGetUser" sptr, sptr, sptr
; NPGetUser lpName, varptr(lpUserName), varptr(lpnBufferLen)   ; 戻り値は stat
; lpName : LPWSTR -> "sptr"
; lpUserName : LPWSTR out -> "sptr"
; lpnBufferLen : DWORD* 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 (
	davclnt = windows.NewLazySystemDLL("davclnt.dll")
	procNPGetUser = davclnt.NewProc("NPGetUser")
)

// lpName (LPWSTR), lpUserName (LPWSTR out), lpnBufferLen (DWORD* in/out)
r1, _, err := procNPGetUser.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpName))),
	uintptr(lpUserName),
	uintptr(lpnBufferLen),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function NPGetUser(
  lpName: PWideChar;   // LPWSTR
  lpUserName: PWideChar;   // LPWSTR out
  lpnBufferLen: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'davclnt.dll' name 'NPGetUser';

result := DllCall("davclnt\NPGetUser"
    , "WStr", lpName   ; LPWSTR
    , "Ptr", lpUserName   ; LPWSTR out
    , "Ptr", lpnBufferLen   ; DWORD* in/out
    , "UInt")   ; return: DWORD

●NPGetUser(lpName, lpUserName, lpnBufferLen) = DLL("davclnt.dll", "dword NPGetUser(char*, char*, void*)")
# 呼び出し: NPGetUser(lpName, lpUserName, lpnBufferLen)
# lpName : LPWSTR -> "char*"
# lpUserName : LPWSTR out -> "char*"
# lpnBufferLen : DWORD* 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 "davclnt" fn NPGetUser(
    lpName: [*c]const u16, // LPWSTR
    lpUserName: [*c]u16, // LPWSTR out
    lpnBufferLen: [*c]u32 // DWORD* in/out
) callconv(std.os.windows.WINAPI) u32;

proc NPGetUser(
    lpName: WideCString,  # LPWSTR
    lpUserName: ptr uint16,  # LPWSTR out
    lpnBufferLen: ptr uint32  # DWORD* in/out
): uint32 {.importc: "NPGetUser", stdcall, dynlib: "davclnt.dll".}

pragma(lib, "davclnt");
extern(Windows)
uint NPGetUser(
    const(wchar)* lpName,   // LPWSTR
    wchar* lpUserName,   // LPWSTR out
    uint* lpnBufferLen   // DWORD* in/out
);

ccall((:NPGetUser, "davclnt.dll"), stdcall, UInt32,
      (Cwstring, Ptr{UInt16}, Ptr{UInt32}),
      lpName, lpUserName, lpnBufferLen)
# lpName : LPWSTR -> Cwstring
# lpUserName : LPWSTR out -> Ptr{UInt16}
# lpnBufferLen : DWORD* 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 NPGetUser(
    const uint16_t* lpName,
    uint16_t* lpUserName,
    uint32_t* lpnBufferLen);
]]
local davclnt = ffi.load("davclnt")
-- davclnt.NPGetUser(lpName, lpUserName, lpnBufferLen)
-- lpName : LPWSTR
-- lpUserName : LPWSTR out
-- lpnBufferLen : DWORD* 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('davclnt.dll');
const NPGetUser = lib.func('__stdcall', 'NPGetUser', 'uint32_t', ['str16', 'uint16_t *', 'uint32_t *']);
// NPGetUser(lpName, lpUserName, lpnBufferLen)
// lpName : LPWSTR -> 'str16'
// lpUserName : LPWSTR out -> 'uint16_t *'
// lpnBufferLen : DWORD* 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("davclnt.dll", {
  NPGetUser: { parameters: ["buffer", "buffer", "pointer"], result: "u32" },
});
// lib.symbols.NPGetUser(lpName, lpUserName, lpnBufferLen)
// lpName : LPWSTR -> "buffer"
// lpUserName : LPWSTR out -> "buffer"
// lpnBufferLen : DWORD* in/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
uint32_t NPGetUser(
    const uint16_t* lpName,
    uint16_t* lpUserName,
    uint32_t* lpnBufferLen);
C, "davclnt.dll");
// $ffi->NPGetUser(lpName, lpUserName, lpnBufferLen);
// lpName : LPWSTR
// lpUserName : LPWSTR out
// lpnBufferLen : DWORD* 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 Davclnt extends StdCallLibrary {
    Davclnt INSTANCE = Native.load("davclnt", Davclnt.class);
    int NPGetUser(
        WString lpName,   // LPWSTR
        char[] lpUserName,   // LPWSTR out
        IntByReference lpnBufferLen   // DWORD* in/out
    );
}

@[Link("davclnt")]
lib Libdavclnt
  fun NPGetUser = NPGetUser(
    lpName : UInt16*,   # LPWSTR
    lpUserName : UInt16*,   # LPWSTR out
    lpnBufferLen : UInt32*   # DWORD* 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 NPGetUserNative = Uint32 Function(Pointer<Utf16>, Pointer<Utf16>, Pointer<Uint32>);
typedef NPGetUserDart = int Function(Pointer<Utf16>, Pointer<Utf16>, Pointer<Uint32>);
final NPGetUser = DynamicLibrary.open('davclnt.dll')
    .lookupFunction<NPGetUserNative, NPGetUserDart>('NPGetUser');
// lpName : LPWSTR -> Pointer<Utf16>
// lpUserName : LPWSTR out -> Pointer<Utf16>
// lpnBufferLen : DWORD* in/out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function NPGetUser(
  lpName: PWideChar;   // LPWSTR
  lpUserName: PWideChar;   // LPWSTR out
  lpnBufferLen: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'davclnt.dll' name 'NPGetUser';

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

foreign import stdcall safe "NPGetUser"
  c_NPGetUser :: CWString -> CWString -> Ptr Word32 -> IO Word32
-- lpName : LPWSTR -> CWString
-- lpUserName : LPWSTR out -> CWString
-- lpnBufferLen : DWORD* 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 npgetuser =
  foreign "NPGetUser"
    ((ptr uint16_t) @-> (ptr uint16_t) @-> (ptr uint32_t) @-> returning uint32_t)
(* lpName : LPWSTR -> (ptr uint16_t) *)
(* lpUserName : LPWSTR out -> (ptr uint16_t) *)
(* lpnBufferLen : DWORD* 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 davclnt (t "davclnt.dll"))
(cffi:use-foreign-library davclnt)

(cffi:defcfun ("NPGetUser" npget-user :convention :stdcall) :uint32
  (lp-name (:string :encoding :utf-16le))   ; LPWSTR
  (lp-user-name :pointer)   ; LPWSTR out
  (lpn-buffer-len :pointer))   ; DWORD* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $NPGetUser = Win32::API::More->new('davclnt',
    'DWORD NPGetUser(LPCWSTR lpName, LPWSTR lpUserName, LPVOID lpnBufferLen)');
# my $ret = $NPGetUser->Call($lpName, $lpUserName, $lpnBufferLen);
# lpName : LPWSTR -> LPCWSTR
# lpUserName : LPWSTR out -> LPWSTR
# lpnBufferLen : DWORD* 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。