WsGetErrorString

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

HRESULT WsGetErrorString(
    WS_ERROR* error,
    DWORD index,
    WS_STRING* string
);

<DllImport("webservices.dll", ExactSpelling:=True)>
Public Shared Function WsGetErrorString(
    ByRef [error] As IntPtr,   ' WS_ERROR*
    index As UInteger,   ' DWORD
    [string] As IntPtr   ' WS_STRING* out
) As Integer
End Function

' error : WS_ERROR*
' index : DWORD
' string : WS_STRING* out
Declare PtrSafe Function WsGetErrorString Lib "webservices" ( _
    ByRef error As LongPtr, _
    ByVal index As Long, _
    ByVal string As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

WsGetErrorString = ctypes.windll.webservices.WsGetErrorString
WsGetErrorString.restype = ctypes.c_int
WsGetErrorString.argtypes = [
    ctypes.c_void_p,  # error : WS_ERROR*
    wintypes.DWORD,  # index : DWORD
    ctypes.c_void_p,  # string : WS_STRING* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('webservices.dll')
WsGetErrorString = Fiddle::Function.new(
  lib['WsGetErrorString'],
  [
    Fiddle::TYPE_VOIDP,  # error : WS_ERROR*
    -Fiddle::TYPE_INT,  # index : DWORD
    Fiddle::TYPE_VOIDP,  # string : WS_STRING* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "webservices")]
extern "system" {
    fn WsGetErrorString(
        error: *mut isize,  // WS_ERROR*
        index: u32,  // DWORD
        string: *mut WS_STRING  // WS_STRING* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("webservices.dll")]
public static extern int WsGetErrorString(ref IntPtr error, uint index, IntPtr string);
"@
$api = Add-Type -MemberDefinition $sig -Name 'webservices_WsGetErrorString' -Namespace Win32 -PassThru
# $api::WsGetErrorString(error, index, string)

#uselib "webservices.dll"
#func global WsGetErrorString "WsGetErrorString" sptr, sptr, sptr
; WsGetErrorString error, index, varptr(string)   ; 戻り値は stat
; error : WS_ERROR* -> "sptr"
; index : DWORD -> "sptr"
; string : WS_STRING* 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 "webservices.dll"
#cfunc global WsGetErrorString "WsGetErrorString" int, int, var
; res = WsGetErrorString(error, index, string)
; error : WS_ERROR* -> "int"
; index : DWORD -> "int"
; string : WS_STRING* 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。

; HRESULT WsGetErrorString(WS_ERROR* error, DWORD index, WS_STRING* string)
#uselib "webservices.dll"
#cfunc global WsGetErrorString "WsGetErrorString" int, int, var
; res = WsGetErrorString(error, index, string)
; error : WS_ERROR* -> "int"
; index : DWORD -> "int"
; string : WS_STRING* 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 (
	webservices = windows.NewLazySystemDLL("webservices.dll")
	procWsGetErrorString = webservices.NewProc("WsGetErrorString")
)

// error (WS_ERROR*), index (DWORD), string (WS_STRING* out)
r1, _, err := procWsGetErrorString.Call(
	uintptr(error),
	uintptr(index),
	uintptr(string),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function WsGetErrorString(
  error: Pointer;   // WS_ERROR*
  index: DWORD;   // DWORD
  string: Pointer   // WS_STRING* out
): Integer; stdcall;
  external 'webservices.dll' name 'WsGetErrorString';

result := DllCall("webservices\WsGetErrorString"
    , "Ptr", error   ; WS_ERROR*
    , "UInt", index   ; DWORD
    , "Ptr", string   ; WS_STRING* out
    , "Int")   ; return: HRESULT

●WsGetErrorString(error, index, string) = DLL("webservices.dll", "int WsGetErrorString(void*, dword, void*)")
# 呼び出し: WsGetErrorString(error, index, string)
# error : WS_ERROR* -> "void*"
# index : DWORD -> "dword"
# string : WS_STRING* 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)。