WNetGetUserA

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

WIN32_ERROR WNetGetUserA(
    LPCSTR lpName,   // optional
    LPSTR lpUserName,
    DWORD* lpnLength
);

<DllImport("MPR.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function WNetGetUserA(
    <MarshalAs(UnmanagedType.LPStr)> lpName As String,   ' LPCSTR optional
    <MarshalAs(UnmanagedType.LPStr)> lpUserName As System.Text.StringBuilder,   ' LPSTR out
    ByRef lpnLength As UInteger   ' DWORD* in/out
) As UInteger
End Function

' lpName : LPCSTR optional
' lpUserName : LPSTR out
' lpnLength : DWORD* in/out
Declare PtrSafe Function WNetGetUserA Lib "mpr" ( _
    ByVal lpName As String, _
    ByVal lpUserName As String, _
    ByRef lpnLength 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

WNetGetUserA = ctypes.windll.mpr.WNetGetUserA
WNetGetUserA.restype = wintypes.DWORD
WNetGetUserA.argtypes = [
    wintypes.LPCSTR,  # lpName : LPCSTR optional
    wintypes.LPSTR,  # lpUserName : LPSTR out
    ctypes.POINTER(wintypes.DWORD),  # lpnLength : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MPR.dll')
WNetGetUserA = Fiddle::Function.new(
  lib['WNetGetUserA'],
  [
    Fiddle::TYPE_VOIDP,  # lpName : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # lpUserName : LPSTR out
    Fiddle::TYPE_VOIDP,  # lpnLength : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "mpr")]
extern "system" {
    fn WNetGetUserA(
        lpName: *const u8,  // LPCSTR optional
        lpUserName: *mut u8,  // LPSTR out
        lpnLength: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MPR.dll", CharSet = CharSet.Ansi)]
public static extern uint WNetGetUserA([MarshalAs(UnmanagedType.LPStr)] string lpName, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder lpUserName, ref uint lpnLength);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MPR_WNetGetUserA' -Namespace Win32 -PassThru
# $api::WNetGetUserA(lpName, lpUserName, lpnLength)

#uselib "MPR.dll"
#func global WNetGetUserA "WNetGetUserA" sptr, sptr, sptr
; WNetGetUserA lpName, varptr(lpUserName), varptr(lpnLength)   ; 戻り値は stat
; lpName : LPCSTR optional -> "sptr"
; lpUserName : LPSTR out -> "sptr"
; lpnLength : 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 (
	mpr = windows.NewLazySystemDLL("MPR.dll")
	procWNetGetUserA = mpr.NewProc("WNetGetUserA")
)

// lpName (LPCSTR optional), lpUserName (LPSTR out), lpnLength (DWORD* in/out)
r1, _, err := procWNetGetUserA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpName))),
	uintptr(lpUserName),
	uintptr(lpnLength),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function WNetGetUserA(
  lpName: PAnsiChar;   // LPCSTR optional
  lpUserName: PAnsiChar;   // LPSTR out
  lpnLength: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'MPR.dll' name 'WNetGetUserA';

result := DllCall("MPR\WNetGetUserA"
    , "AStr", lpName   ; LPCSTR optional
    , "Ptr", lpUserName   ; LPSTR out
    , "Ptr", lpnLength   ; DWORD* in/out
    , "UInt")   ; return: WIN32_ERROR

●WNetGetUserA(lpName, lpUserName, lpnLength) = DLL("MPR.dll", "dword WNetGetUserA(char*, char*, void*)")
# 呼び出し: WNetGetUserA(lpName, lpUserName, lpnLength)
# lpName : LPCSTR optional -> "char*"
# lpUserName : LPSTR out -> "char*"
# lpnLength : 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 "mpr" fn WNetGetUserA(
    lpName: [*c]const u8, // LPCSTR optional
    lpUserName: [*c]u8, // LPSTR out
    lpnLength: [*c]u32 // DWORD* in/out
) callconv(std.os.windows.WINAPI) u32;

proc WNetGetUserA(
    lpName: cstring,  # LPCSTR optional
    lpUserName: ptr char,  # LPSTR out
    lpnLength: ptr uint32  # DWORD* in/out
): uint32 {.importc: "WNetGetUserA", stdcall, dynlib: "MPR.dll".}

pragma(lib, "mpr");
extern(Windows)
uint WNetGetUserA(
    const(char)* lpName,   // LPCSTR optional
    char* lpUserName,   // LPSTR out
    uint* lpnLength   // DWORD* in/out
);

ccall((:WNetGetUserA, "MPR.dll"), stdcall, UInt32,
      (Cstring, Ptr{UInt8}, Ptr{UInt32}),
      lpName, lpUserName, lpnLength)
# lpName : LPCSTR optional -> Cstring
# lpUserName : LPSTR out -> Ptr{UInt8}
# lpnLength : 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 WNetGetUserA(
    const char* lpName,
    char* lpUserName,
    uint32_t* lpnLength);
]]
local mpr = ffi.load("mpr")
-- mpr.WNetGetUserA(lpName, lpUserName, lpnLength)
-- lpName : LPCSTR optional
-- lpUserName : LPSTR out
-- lpnLength : 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('MPR.dll');
const WNetGetUserA = lib.func('__stdcall', 'WNetGetUserA', 'uint32_t', ['str', 'char *', 'uint32_t *']);
// WNetGetUserA(lpName, lpUserName, lpnLength)
// lpName : LPCSTR optional -> 'str'
// lpUserName : LPSTR out -> 'char *'
// lpnLength : 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("MPR.dll", {
  WNetGetUserA: { parameters: ["buffer", "buffer", "pointer"], result: "u32" },
});
// lib.symbols.WNetGetUserA(lpName, lpUserName, lpnLength)
// lpName : LPCSTR optional -> "buffer"
// lpUserName : LPSTR out -> "buffer"
// lpnLength : DWORD* 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 WNetGetUserA(
    const char* lpName,
    char* lpUserName,
    uint32_t* lpnLength);
C, "MPR.dll");
// $ffi->WNetGetUserA(lpName, lpUserName, lpnLength);
// lpName : LPCSTR optional
// lpUserName : LPSTR out
// lpnLength : 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 Mpr extends StdCallLibrary {
    Mpr INSTANCE = Native.load("mpr", Mpr.class, W32APIOptions.ASCII_OPTIONS);
    int WNetGetUserA(
        String lpName,   // LPCSTR optional
        byte[] lpUserName,   // LPSTR out
        IntByReference lpnLength   // DWORD* in/out
    );
}

@[Link("mpr")]
lib LibMPR
  fun WNetGetUserA = WNetGetUserA(
    lpName : UInt8*,   # LPCSTR optional
    lpUserName : UInt8*,   # LPSTR out
    lpnLength : 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 WNetGetUserANative = Uint32 Function(Pointer<Utf8>, Pointer<Utf8>, Pointer<Uint32>);
typedef WNetGetUserADart = int Function(Pointer<Utf8>, Pointer<Utf8>, Pointer<Uint32>);
final WNetGetUserA = DynamicLibrary.open('MPR.dll')
    .lookupFunction<WNetGetUserANative, WNetGetUserADart>('WNetGetUserA');
// lpName : LPCSTR optional -> Pointer<Utf8>
// lpUserName : LPSTR out -> Pointer<Utf8>
// lpnLength : DWORD* in/out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function WNetGetUserA(
  lpName: PAnsiChar;   // LPCSTR optional
  lpUserName: PAnsiChar;   // LPSTR out
  lpnLength: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'MPR.dll' name 'WNetGetUserA';

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

foreign import stdcall safe "WNetGetUserA"
  c_WNetGetUserA :: CString -> CString -> Ptr Word32 -> IO Word32
-- lpName : LPCSTR optional -> CString
-- lpUserName : LPSTR out -> CString
-- lpnLength : 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 wnetgetusera =
  foreign "WNetGetUserA"
    (string @-> string @-> (ptr uint32_t) @-> returning uint32_t)
(* lpName : LPCSTR optional -> string *)
(* lpUserName : LPSTR out -> string *)
(* lpnLength : 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 mpr (t "MPR.dll"))
(cffi:use-foreign-library mpr)

(cffi:defcfun ("WNetGetUserA" wnet-get-user-a :convention :stdcall) :uint32
  (lp-name :string)   ; LPCSTR optional
  (lp-user-name :pointer)   ; LPSTR out
  (lpn-length :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 $WNetGetUserA = Win32::API::More->new('MPR',
    'DWORD WNetGetUserA(LPCSTR lpName, LPSTR lpUserName, LPVOID lpnLength)');
# my $ret = $WNetGetUserA->Call($lpName, $lpUserName, $lpnLength);
# lpName : LPCSTR optional -> LPCSTR
# lpUserName : LPSTR out -> LPSTR
# lpnLength : 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。