WNetGetLastErrorW

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

WIN32_ERROR WNetGetLastErrorW(
    DWORD* lpError,
    LPWSTR lpErrorBuf,
    DWORD nErrorBufSize,
    LPWSTR lpNameBuf,
    DWORD nNameBufSize
);

<DllImport("MPR.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WNetGetLastErrorW(
    <Out> ByRef lpError As UInteger,   ' DWORD* out
    <MarshalAs(UnmanagedType.LPWStr)> lpErrorBuf As System.Text.StringBuilder,   ' LPWSTR out
    nErrorBufSize As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> lpNameBuf As System.Text.StringBuilder,   ' LPWSTR out
    nNameBufSize As UInteger   ' DWORD
) As UInteger
End Function

' lpError : DWORD* out
' lpErrorBuf : LPWSTR out
' nErrorBufSize : DWORD
' lpNameBuf : LPWSTR out
' nNameBufSize : DWORD
Declare PtrSafe Function WNetGetLastErrorW Lib "mpr" ( _
    ByRef lpError As Long, _
    ByVal lpErrorBuf As LongPtr, _
    ByVal nErrorBufSize As Long, _
    ByVal lpNameBuf As LongPtr, _
    ByVal nNameBufSize As Long) 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

WNetGetLastErrorW = ctypes.windll.mpr.WNetGetLastErrorW
WNetGetLastErrorW.restype = wintypes.DWORD
WNetGetLastErrorW.argtypes = [
    ctypes.POINTER(wintypes.DWORD),  # lpError : DWORD* out
    wintypes.LPWSTR,  # lpErrorBuf : LPWSTR out
    wintypes.DWORD,  # nErrorBufSize : DWORD
    wintypes.LPWSTR,  # lpNameBuf : LPWSTR out
    wintypes.DWORD,  # nNameBufSize : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MPR.dll')
WNetGetLastErrorW = Fiddle::Function.new(
  lib['WNetGetLastErrorW'],
  [
    Fiddle::TYPE_VOIDP,  # lpError : DWORD* out
    Fiddle::TYPE_VOIDP,  # lpErrorBuf : LPWSTR out
    -Fiddle::TYPE_INT,  # nErrorBufSize : DWORD
    Fiddle::TYPE_VOIDP,  # lpNameBuf : LPWSTR out
    -Fiddle::TYPE_INT,  # nNameBufSize : DWORD
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "mpr")]
extern "system" {
    fn WNetGetLastErrorW(
        lpError: *mut u32,  // DWORD* out
        lpErrorBuf: *mut u16,  // LPWSTR out
        nErrorBufSize: u32,  // DWORD
        lpNameBuf: *mut u16,  // LPWSTR out
        nNameBufSize: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MPR.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern uint WNetGetLastErrorW(out uint lpError, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpErrorBuf, uint nErrorBufSize, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpNameBuf, uint nNameBufSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MPR_WNetGetLastErrorW' -Namespace Win32 -PassThru
# $api::WNetGetLastErrorW(lpError, lpErrorBuf, nErrorBufSize, lpNameBuf, nNameBufSize)

#uselib "MPR.dll"
#func global WNetGetLastErrorW "WNetGetLastErrorW" wptr, wptr, wptr, wptr, wptr
; WNetGetLastErrorW varptr(lpError), varptr(lpErrorBuf), nErrorBufSize, varptr(lpNameBuf), nNameBufSize   ; 戻り値は stat
; lpError : DWORD* out -> "wptr"
; lpErrorBuf : LPWSTR out -> "wptr"
; nErrorBufSize : DWORD -> "wptr"
; lpNameBuf : LPWSTR out -> "wptr"
; nNameBufSize : DWORD -> "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。

#uselib "MPR.dll"
#cfunc global WNetGetLastErrorW "WNetGetLastErrorW" var, var, int, var, int
; res = WNetGetLastErrorW(lpError, lpErrorBuf, nErrorBufSize, lpNameBuf, nNameBufSize)
; lpError : DWORD* out -> "var"
; lpErrorBuf : LPWSTR out -> "var"
; nErrorBufSize : DWORD -> "int"
; lpNameBuf : LPWSTR out -> "var"
; nNameBufSize : DWORD -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; WIN32_ERROR WNetGetLastErrorW(DWORD* lpError, LPWSTR lpErrorBuf, DWORD nErrorBufSize, LPWSTR lpNameBuf, DWORD nNameBufSize)
#uselib "MPR.dll"
#cfunc global WNetGetLastErrorW "WNetGetLastErrorW" var, var, int, var, int
; res = WNetGetLastErrorW(lpError, lpErrorBuf, nErrorBufSize, lpNameBuf, nNameBufSize)
; lpError : DWORD* out -> "var"
; lpErrorBuf : LPWSTR out -> "var"
; nErrorBufSize : DWORD -> "int"
; lpNameBuf : LPWSTR out -> "var"
; nNameBufSize : DWORD -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	mpr = windows.NewLazySystemDLL("MPR.dll")
	procWNetGetLastErrorW = mpr.NewProc("WNetGetLastErrorW")
)

// lpError (DWORD* out), lpErrorBuf (LPWSTR out), nErrorBufSize (DWORD), lpNameBuf (LPWSTR out), nNameBufSize (DWORD)
r1, _, err := procWNetGetLastErrorW.Call(
	uintptr(lpError),
	uintptr(lpErrorBuf),
	uintptr(nErrorBufSize),
	uintptr(lpNameBuf),
	uintptr(nNameBufSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function WNetGetLastErrorW(
  lpError: Pointer;   // DWORD* out
  lpErrorBuf: PWideChar;   // LPWSTR out
  nErrorBufSize: DWORD;   // DWORD
  lpNameBuf: PWideChar;   // LPWSTR out
  nNameBufSize: DWORD   // DWORD
): DWORD; stdcall;
  external 'MPR.dll' name 'WNetGetLastErrorW';

result := DllCall("MPR\WNetGetLastErrorW"
    , "Ptr", lpError   ; DWORD* out
    , "Ptr", lpErrorBuf   ; LPWSTR out
    , "UInt", nErrorBufSize   ; DWORD
    , "Ptr", lpNameBuf   ; LPWSTR out
    , "UInt", nNameBufSize   ; DWORD
    , "UInt")   ; return: WIN32_ERROR

●WNetGetLastErrorW(lpError, lpErrorBuf, nErrorBufSize, lpNameBuf, nNameBufSize) = DLL("MPR.dll", "dword WNetGetLastErrorW(void*, char*, dword, char*, dword)")
# 呼び出し: WNetGetLastErrorW(lpError, lpErrorBuf, nErrorBufSize, lpNameBuf, nNameBufSize)
# lpError : DWORD* out -> "void*"
# lpErrorBuf : LPWSTR out -> "char*"
# nErrorBufSize : DWORD -> "dword"
# lpNameBuf : LPWSTR out -> "char*"
# nNameBufSize : DWORD -> "dword"
# 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。