DceErrorInqTextW

// RPCRT4.dll  (Unicode / -W)
#include <windows.h>

RPC_STATUS DceErrorInqTextW(
    RPC_STATUS RpcStatus,
    LPWSTR ErrorText
);

<DllImport("RPCRT4.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function DceErrorInqTextW(
    RpcStatus As Integer,   ' RPC_STATUS
    <MarshalAs(UnmanagedType.LPWStr)> ErrorText As System.Text.StringBuilder   ' LPWSTR out
) As Integer
End Function

' RpcStatus : RPC_STATUS
' ErrorText : LPWSTR out
Declare PtrSafe Function DceErrorInqTextW Lib "rpcrt4" ( _
    ByVal RpcStatus As Long, _
    ByVal ErrorText 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

DceErrorInqTextW = ctypes.windll.rpcrt4.DceErrorInqTextW
DceErrorInqTextW.restype = ctypes.c_int
DceErrorInqTextW.argtypes = [
    ctypes.c_int,  # RpcStatus : RPC_STATUS
    wintypes.LPWSTR,  # ErrorText : LPWSTR out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('RPCRT4.dll')
DceErrorInqTextW = Fiddle::Function.new(
  lib['DceErrorInqTextW'],
  [
    Fiddle::TYPE_INT,  # RpcStatus : RPC_STATUS
    Fiddle::TYPE_VOIDP,  # ErrorText : LPWSTR out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "rpcrt4")]
extern "system" {
    fn DceErrorInqTextW(
        RpcStatus: i32,  // RPC_STATUS
        ErrorText: *mut u16  // LPWSTR out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("RPCRT4.dll", CharSet = CharSet.Unicode)]
public static extern int DceErrorInqTextW(int RpcStatus, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder ErrorText);
"@
$api = Add-Type -MemberDefinition $sig -Name 'RPCRT4_DceErrorInqTextW' -Namespace Win32 -PassThru
# $api::DceErrorInqTextW(RpcStatus, ErrorText)

#uselib "RPCRT4.dll"
#func global DceErrorInqTextW "DceErrorInqTextW" wptr, wptr
; DceErrorInqTextW RpcStatus, varptr(ErrorText)   ; 戻り値は stat
; RpcStatus : RPC_STATUS -> "wptr"
; ErrorText : LPWSTR 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。

#uselib "RPCRT4.dll"
#cfunc global DceErrorInqTextW "DceErrorInqTextW" int, var
; res = DceErrorInqTextW(RpcStatus, ErrorText)
; RpcStatus : RPC_STATUS -> "int"
; ErrorText : LPWSTR 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。

; RPC_STATUS DceErrorInqTextW(RPC_STATUS RpcStatus, LPWSTR ErrorText)
#uselib "RPCRT4.dll"
#cfunc global DceErrorInqTextW "DceErrorInqTextW" int, var
; res = DceErrorInqTextW(RpcStatus, ErrorText)
; RpcStatus : RPC_STATUS -> "int"
; ErrorText : LPWSTR 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 (
	rpcrt4 = windows.NewLazySystemDLL("RPCRT4.dll")
	procDceErrorInqTextW = rpcrt4.NewProc("DceErrorInqTextW")
)

// RpcStatus (RPC_STATUS), ErrorText (LPWSTR out)
r1, _, err := procDceErrorInqTextW.Call(
	uintptr(RpcStatus),
	uintptr(ErrorText),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // RPC_STATUS

function DceErrorInqTextW(
  RpcStatus: Integer;   // RPC_STATUS
  ErrorText: PWideChar   // LPWSTR out
): Integer; stdcall;
  external 'RPCRT4.dll' name 'DceErrorInqTextW';

result := DllCall("RPCRT4\DceErrorInqTextW"
    , "Int", RpcStatus   ; RPC_STATUS
    , "Ptr", ErrorText   ; LPWSTR out
    , "Int")   ; return: RPC_STATUS

●DceErrorInqTextW(RpcStatus, ErrorText) = DLL("RPCRT4.dll", "int DceErrorInqTextW(int, char*)")
# 呼び出し: DceErrorInqTextW(RpcStatus, ErrorText)
# RpcStatus : RPC_STATUS -> "int"
# ErrorText : LPWSTR out -> "char*"
# 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。