DavGetExtendedError

// NETAPI32.dll
#include <windows.h>

DWORD DavGetExtendedError(
    HANDLE hFile,
    DWORD* ExtError,
    LPWSTR ExtErrorString,
    DWORD* cChSize
);

<DllImport("NETAPI32.dll", ExactSpelling:=True)>
Public Shared Function DavGetExtendedError(
    hFile As IntPtr,   ' HANDLE
    <Out> ByRef ExtError As UInteger,   ' DWORD* out
    <MarshalAs(UnmanagedType.LPWStr)> ExtErrorString As System.Text.StringBuilder,   ' LPWSTR out
    ByRef cChSize As UInteger   ' DWORD* in/out
) As UInteger
End Function

' hFile : HANDLE
' ExtError : DWORD* out
' ExtErrorString : LPWSTR out
' cChSize : DWORD* in/out
Declare PtrSafe Function DavGetExtendedError Lib "netapi32" ( _
    ByVal hFile As LongPtr, _
    ByRef ExtError As Long, _
    ByVal ExtErrorString As LongPtr, _
    ByRef cChSize 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

DavGetExtendedError = ctypes.windll.netapi32.DavGetExtendedError
DavGetExtendedError.restype = wintypes.DWORD
DavGetExtendedError.argtypes = [
    wintypes.HANDLE,  # hFile : HANDLE
    ctypes.POINTER(wintypes.DWORD),  # ExtError : DWORD* out
    wintypes.LPWSTR,  # ExtErrorString : LPWSTR out
    ctypes.POINTER(wintypes.DWORD),  # cChSize : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('NETAPI32.dll')
DavGetExtendedError = Fiddle::Function.new(
  lib['DavGetExtendedError'],
  [
    Fiddle::TYPE_VOIDP,  # hFile : HANDLE
    Fiddle::TYPE_VOIDP,  # ExtError : DWORD* out
    Fiddle::TYPE_VOIDP,  # ExtErrorString : LPWSTR out
    Fiddle::TYPE_VOIDP,  # cChSize : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "netapi32")]
extern "system" {
    fn DavGetExtendedError(
        hFile: *mut core::ffi::c_void,  // HANDLE
        ExtError: *mut u32,  // DWORD* out
        ExtErrorString: *mut u16,  // LPWSTR out
        cChSize: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("NETAPI32.dll")]
public static extern uint DavGetExtendedError(IntPtr hFile, out uint ExtError, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder ExtErrorString, ref uint cChSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'NETAPI32_DavGetExtendedError' -Namespace Win32 -PassThru
# $api::DavGetExtendedError(hFile, ExtError, ExtErrorString, cChSize)

#uselib "NETAPI32.dll"
#func global DavGetExtendedError "DavGetExtendedError" sptr, sptr, sptr, sptr
; DavGetExtendedError hFile, varptr(ExtError), varptr(ExtErrorString), varptr(cChSize)   ; 戻り値は stat
; hFile : HANDLE -> "sptr"
; ExtError : DWORD* out -> "sptr"
; ExtErrorString : LPWSTR out -> "sptr"
; cChSize : 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。

#uselib "NETAPI32.dll"
#cfunc global DavGetExtendedError "DavGetExtendedError" sptr, var, var, var
; res = DavGetExtendedError(hFile, ExtError, ExtErrorString, cChSize)
; hFile : HANDLE -> "sptr"
; ExtError : DWORD* out -> "var"
; ExtErrorString : LPWSTR out -> "var"
; cChSize : DWORD* in/out -> "var"
; ※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。

; DWORD DavGetExtendedError(HANDLE hFile, DWORD* ExtError, LPWSTR ExtErrorString, DWORD* cChSize)
#uselib "NETAPI32.dll"
#cfunc global DavGetExtendedError "DavGetExtendedError" intptr, var, var, var
; res = DavGetExtendedError(hFile, ExtError, ExtErrorString, cChSize)
; hFile : HANDLE -> "intptr"
; ExtError : DWORD* out -> "var"
; ExtErrorString : LPWSTR out -> "var"
; cChSize : DWORD* in/out -> "var"
; ※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 (
	netapi32 = windows.NewLazySystemDLL("NETAPI32.dll")
	procDavGetExtendedError = netapi32.NewProc("DavGetExtendedError")
)

// hFile (HANDLE), ExtError (DWORD* out), ExtErrorString (LPWSTR out), cChSize (DWORD* in/out)
r1, _, err := procDavGetExtendedError.Call(
	uintptr(hFile),
	uintptr(ExtError),
	uintptr(ExtErrorString),
	uintptr(cChSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DavGetExtendedError(
  hFile: THandle;   // HANDLE
  ExtError: Pointer;   // DWORD* out
  ExtErrorString: PWideChar;   // LPWSTR out
  cChSize: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'NETAPI32.dll' name 'DavGetExtendedError';

result := DllCall("NETAPI32\DavGetExtendedError"
    , "Ptr", hFile   ; HANDLE
    , "Ptr", ExtError   ; DWORD* out
    , "Ptr", ExtErrorString   ; LPWSTR out
    , "Ptr", cChSize   ; DWORD* in/out
    , "UInt")   ; return: DWORD

●DavGetExtendedError(hFile, ExtError, ExtErrorString, cChSize) = DLL("NETAPI32.dll", "dword DavGetExtendedError(void*, void*, char*, void*)")
# 呼び出し: DavGetExtendedError(hFile, ExtError, ExtErrorString, cChSize)
# hFile : HANDLE -> "void*"
# ExtError : DWORD* out -> "void*"
# ExtErrorString : LPWSTR out -> "char*"
# cChSize : 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)。