WsAlloc

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

HRESULT WsAlloc(
    WS_HEAP* heap,
    UINT_PTR size,
    void** ptr,
    WS_ERROR* error   // optional
);

<DllImport("webservices.dll", ExactSpelling:=True)>
Public Shared Function WsAlloc(
    ByRef heap As IntPtr,   ' WS_HEAP*
    size As UIntPtr,   ' UINT_PTR
    ptr As IntPtr,   ' void** out
    [error] As IntPtr   ' WS_ERROR* optional
) As Integer
End Function

' heap : WS_HEAP*
' size : UINT_PTR
' ptr : void** out
' error : WS_ERROR* optional
Declare PtrSafe Function WsAlloc Lib "webservices" ( _
    ByRef heap As LongPtr, _
    ByVal size As LongPtr, _
    ByVal ptr As LongPtr, _
    ByVal error 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

WsAlloc = ctypes.windll.webservices.WsAlloc
WsAlloc.restype = ctypes.c_int
WsAlloc.argtypes = [
    ctypes.c_void_p,  # heap : WS_HEAP*
    ctypes.c_size_t,  # size : UINT_PTR
    ctypes.c_void_p,  # ptr : void** out
    ctypes.c_void_p,  # error : WS_ERROR* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('webservices.dll')
WsAlloc = Fiddle::Function.new(
  lib['WsAlloc'],
  [
    Fiddle::TYPE_VOIDP,  # heap : WS_HEAP*
    Fiddle::TYPE_UINTPTR_T,  # size : UINT_PTR
    Fiddle::TYPE_VOIDP,  # ptr : void** out
    Fiddle::TYPE_VOIDP,  # error : WS_ERROR* optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "webservices")]
extern "system" {
    fn WsAlloc(
        heap: *mut isize,  // WS_HEAP*
        size: usize,  // UINT_PTR
        ptr: *mut *mut (),  // void** out
        error: *mut isize  // WS_ERROR* optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("webservices.dll")]
public static extern int WsAlloc(ref IntPtr heap, UIntPtr size, IntPtr ptr, IntPtr error);
"@
$api = Add-Type -MemberDefinition $sig -Name 'webservices_WsAlloc' -Namespace Win32 -PassThru
# $api::WsAlloc(heap, size, ptr, error)

#uselib "webservices.dll"
#func global WsAlloc "WsAlloc" sptr, sptr, sptr, sptr
; WsAlloc heap, size, ptr, error   ; 戻り値は stat
; heap : WS_HEAP* -> "sptr"
; size : UINT_PTR -> "sptr"
; ptr : void** out -> "sptr"
; error : WS_ERROR* optional -> "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 WsAlloc "WsAlloc" int, sptr, sptr, int
; res = WsAlloc(heap, size, ptr, error)
; heap : WS_HEAP* -> "int"
; size : UINT_PTR -> "sptr"
; ptr : void** out -> "sptr"
; error : WS_ERROR* optional -> "int"

; HRESULT WsAlloc(WS_HEAP* heap, UINT_PTR size, void** ptr, WS_ERROR* error)
#uselib "webservices.dll"
#cfunc global WsAlloc "WsAlloc" int, intptr, intptr, int
; res = WsAlloc(heap, size, ptr, error)
; heap : WS_HEAP* -> "int"
; size : UINT_PTR -> "intptr"
; ptr : void** out -> "intptr"
; error : WS_ERROR* optional -> "int"

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

var (
	webservices = windows.NewLazySystemDLL("webservices.dll")
	procWsAlloc = webservices.NewProc("WsAlloc")
)

// heap (WS_HEAP*), size (UINT_PTR), ptr (void** out), error (WS_ERROR* optional)
r1, _, err := procWsAlloc.Call(
	uintptr(heap),
	uintptr(size),
	uintptr(ptr),
	uintptr(error),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function WsAlloc(
  heap: Pointer;   // WS_HEAP*
  size: NativeUInt;   // UINT_PTR
  ptr: Pointer;   // void** out
  error: Pointer   // WS_ERROR* optional
): Integer; stdcall;
  external 'webservices.dll' name 'WsAlloc';

result := DllCall("webservices\WsAlloc"
    , "Ptr", heap   ; WS_HEAP*
    , "UPtr", size   ; UINT_PTR
    , "Ptr", ptr   ; void** out
    , "Ptr", error   ; WS_ERROR* optional
    , "Int")   ; return: HRESULT

●WsAlloc(heap, size, ptr, error) = DLL("webservices.dll", "int WsAlloc(void*, int, void*, void*)")
# 呼び出し: WsAlloc(heap, size, ptr, error)
# heap : WS_HEAP* -> "void*"
# size : UINT_PTR -> "int"
# ptr : void** out -> "void*"
# error : WS_ERROR* optional -> "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)。