WHvGetCapability

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

HRESULT WHvGetCapability(
    WHV_CAPABILITY_CODE CapabilityCode,
    void* CapabilityBuffer,
    DWORD CapabilityBufferSizeInBytes,
    DWORD* WrittenSizeInBytes   // optional
);

<DllImport("WinHvPlatform.dll", ExactSpelling:=True)>
Public Shared Function WHvGetCapability(
    CapabilityCode As Integer,   ' WHV_CAPABILITY_CODE
    CapabilityBuffer As IntPtr,   ' void* out
    CapabilityBufferSizeInBytes As UInteger,   ' DWORD
    WrittenSizeInBytes As IntPtr   ' DWORD* optional, out
) As Integer
End Function

' CapabilityCode : WHV_CAPABILITY_CODE
' CapabilityBuffer : void* out
' CapabilityBufferSizeInBytes : DWORD
' WrittenSizeInBytes : DWORD* optional, out
Declare PtrSafe Function WHvGetCapability Lib "winhvplatform" ( _
    ByVal CapabilityCode As Long, _
    ByVal CapabilityBuffer As LongPtr, _
    ByVal CapabilityBufferSizeInBytes As Long, _
    ByVal WrittenSizeInBytes 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

WHvGetCapability = ctypes.windll.winhvplatform.WHvGetCapability
WHvGetCapability.restype = ctypes.c_int
WHvGetCapability.argtypes = [
    ctypes.c_int,  # CapabilityCode : WHV_CAPABILITY_CODE
    ctypes.POINTER(None),  # CapabilityBuffer : void* out
    wintypes.DWORD,  # CapabilityBufferSizeInBytes : DWORD
    ctypes.POINTER(wintypes.DWORD),  # WrittenSizeInBytes : DWORD* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WinHvPlatform.dll')
WHvGetCapability = Fiddle::Function.new(
  lib['WHvGetCapability'],
  [
    Fiddle::TYPE_INT,  # CapabilityCode : WHV_CAPABILITY_CODE
    Fiddle::TYPE_VOIDP,  # CapabilityBuffer : void* out
    -Fiddle::TYPE_INT,  # CapabilityBufferSizeInBytes : DWORD
    Fiddle::TYPE_VOIDP,  # WrittenSizeInBytes : DWORD* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "winhvplatform")]
extern "system" {
    fn WHvGetCapability(
        CapabilityCode: i32,  // WHV_CAPABILITY_CODE
        CapabilityBuffer: *mut (),  // void* out
        CapabilityBufferSizeInBytes: u32,  // DWORD
        WrittenSizeInBytes: *mut u32  // DWORD* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WinHvPlatform.dll")]
public static extern int WHvGetCapability(int CapabilityCode, IntPtr CapabilityBuffer, uint CapabilityBufferSizeInBytes, IntPtr WrittenSizeInBytes);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WinHvPlatform_WHvGetCapability' -Namespace Win32 -PassThru
# $api::WHvGetCapability(CapabilityCode, CapabilityBuffer, CapabilityBufferSizeInBytes, WrittenSizeInBytes)

#uselib "WinHvPlatform.dll"
#func global WHvGetCapability "WHvGetCapability" sptr, sptr, sptr, sptr
; WHvGetCapability CapabilityCode, CapabilityBuffer, CapabilityBufferSizeInBytes, varptr(WrittenSizeInBytes)   ; 戻り値は stat
; CapabilityCode : WHV_CAPABILITY_CODE -> "sptr"
; CapabilityBuffer : void* out -> "sptr"
; CapabilityBufferSizeInBytes : DWORD -> "sptr"
; WrittenSizeInBytes : DWORD* optional, 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。

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

var (
	winhvplatform = windows.NewLazySystemDLL("WinHvPlatform.dll")
	procWHvGetCapability = winhvplatform.NewProc("WHvGetCapability")
)

// CapabilityCode (WHV_CAPABILITY_CODE), CapabilityBuffer (void* out), CapabilityBufferSizeInBytes (DWORD), WrittenSizeInBytes (DWORD* optional, out)
r1, _, err := procWHvGetCapability.Call(
	uintptr(CapabilityCode),
	uintptr(CapabilityBuffer),
	uintptr(CapabilityBufferSizeInBytes),
	uintptr(WrittenSizeInBytes),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function WHvGetCapability(
  CapabilityCode: Integer;   // WHV_CAPABILITY_CODE
  CapabilityBuffer: Pointer;   // void* out
  CapabilityBufferSizeInBytes: DWORD;   // DWORD
  WrittenSizeInBytes: Pointer   // DWORD* optional, out
): Integer; stdcall;
  external 'WinHvPlatform.dll' name 'WHvGetCapability';

result := DllCall("WinHvPlatform\WHvGetCapability"
    , "Int", CapabilityCode   ; WHV_CAPABILITY_CODE
    , "Ptr", CapabilityBuffer   ; void* out
    , "UInt", CapabilityBufferSizeInBytes   ; DWORD
    , "Ptr", WrittenSizeInBytes   ; DWORD* optional, out
    , "Int")   ; return: HRESULT

●WHvGetCapability(CapabilityCode, CapabilityBuffer, CapabilityBufferSizeInBytes, WrittenSizeInBytes) = DLL("WinHvPlatform.dll", "int WHvGetCapability(int, void*, dword, void*)")
# 呼び出し: WHvGetCapability(CapabilityCode, CapabilityBuffer, CapabilityBufferSizeInBytes, WrittenSizeInBytes)
# CapabilityCode : WHV_CAPABILITY_CODE -> "int"
# CapabilityBuffer : void* out -> "void*"
# CapabilityBufferSizeInBytes : DWORD -> "dword"
# WrittenSizeInBytes : DWORD* optional, 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)。

const std = @import("std");

extern "winhvplatform" fn WHvGetCapability(
    CapabilityCode: i32, // WHV_CAPABILITY_CODE
    CapabilityBuffer: ?*anyopaque, // void* out
    CapabilityBufferSizeInBytes: u32, // DWORD
    WrittenSizeInBytes: [*c]u32 // DWORD* optional, out
) callconv(std.os.windows.WINAPI) i32;

proc WHvGetCapability(
    CapabilityCode: int32,  # WHV_CAPABILITY_CODE
    CapabilityBuffer: pointer,  # void* out
    CapabilityBufferSizeInBytes: uint32,  # DWORD
    WrittenSizeInBytes: ptr uint32  # DWORD* optional, out
): int32 {.importc: "WHvGetCapability", stdcall, dynlib: "WinHvPlatform.dll".}

pragma(lib, "winhvplatform");
extern(Windows)
int WHvGetCapability(
    int CapabilityCode,   // WHV_CAPABILITY_CODE
    void* CapabilityBuffer,   // void* out
    uint CapabilityBufferSizeInBytes,   // DWORD
    uint* WrittenSizeInBytes   // DWORD* optional, out
);

ccall((:WHvGetCapability, "WinHvPlatform.dll"), stdcall, Int32,
      (Int32, Ptr{Cvoid}, UInt32, Ptr{UInt32}),
      CapabilityCode, CapabilityBuffer, CapabilityBufferSizeInBytes, WrittenSizeInBytes)
# CapabilityCode : WHV_CAPABILITY_CODE -> Int32
# CapabilityBuffer : void* out -> Ptr{Cvoid}
# CapabilityBufferSizeInBytes : DWORD -> UInt32
# WrittenSizeInBytes : DWORD* optional, out -> Ptr{UInt32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t WHvGetCapability(
    int32_t CapabilityCode,
    void* CapabilityBuffer,
    uint32_t CapabilityBufferSizeInBytes,
    uint32_t* WrittenSizeInBytes);
]]
local winhvplatform = ffi.load("winhvplatform")
-- winhvplatform.WHvGetCapability(CapabilityCode, CapabilityBuffer, CapabilityBufferSizeInBytes, WrittenSizeInBytes)
-- CapabilityCode : WHV_CAPABILITY_CODE
-- CapabilityBuffer : void* out
-- CapabilityBufferSizeInBytes : DWORD
-- WrittenSizeInBytes : DWORD* optional, out
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('WinHvPlatform.dll');
const WHvGetCapability = lib.func('__stdcall', 'WHvGetCapability', 'int32_t', ['int32_t', 'void *', 'uint32_t', 'uint32_t *']);
// WHvGetCapability(CapabilityCode, CapabilityBuffer, CapabilityBufferSizeInBytes, WrittenSizeInBytes)
// CapabilityCode : WHV_CAPABILITY_CODE -> 'int32_t'
// CapabilityBuffer : void* out -> 'void *'
// CapabilityBufferSizeInBytes : DWORD -> 'uint32_t'
// WrittenSizeInBytes : DWORD* optional, out -> 'uint32_t *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("WinHvPlatform.dll", {
  WHvGetCapability: { parameters: ["i32", "pointer", "u32", "pointer"], result: "i32" },
});
// lib.symbols.WHvGetCapability(CapabilityCode, CapabilityBuffer, CapabilityBufferSizeInBytes, WrittenSizeInBytes)
// CapabilityCode : WHV_CAPABILITY_CODE -> "i32"
// CapabilityBuffer : void* out -> "pointer"
// CapabilityBufferSizeInBytes : DWORD -> "u32"
// WrittenSizeInBytes : DWORD* optional, out -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t WHvGetCapability(
    int32_t CapabilityCode,
    void* CapabilityBuffer,
    uint32_t CapabilityBufferSizeInBytes,
    uint32_t* WrittenSizeInBytes);
C, "WinHvPlatform.dll");
// $ffi->WHvGetCapability(CapabilityCode, CapabilityBuffer, CapabilityBufferSizeInBytes, WrittenSizeInBytes);
// CapabilityCode : WHV_CAPABILITY_CODE
// CapabilityBuffer : void* out
// CapabilityBufferSizeInBytes : DWORD
// WrittenSizeInBytes : DWORD* optional, out
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Winhvplatform extends StdCallLibrary {
    Winhvplatform INSTANCE = Native.load("winhvplatform", Winhvplatform.class);
    int WHvGetCapability(
        int CapabilityCode,   // WHV_CAPABILITY_CODE
        Pointer CapabilityBuffer,   // void* out
        int CapabilityBufferSizeInBytes,   // DWORD
        IntByReference WrittenSizeInBytes   // DWORD* optional, out
    );
}

@[Link("winhvplatform")]
lib LibWinHvPlatform
  fun WHvGetCapability = WHvGetCapability(
    CapabilityCode : Int32,   # WHV_CAPABILITY_CODE
    CapabilityBuffer : Void*,   # void* out
    CapabilityBufferSizeInBytes : UInt32,   # DWORD
    WrittenSizeInBytes : UInt32*   # DWORD* optional, out
  ) : Int32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef WHvGetCapabilityNative = Int32 Function(Int32, Pointer<Void>, Uint32, Pointer<Uint32>);
typedef WHvGetCapabilityDart = int Function(int, Pointer<Void>, int, Pointer<Uint32>);
final WHvGetCapability = DynamicLibrary.open('WinHvPlatform.dll')
    .lookupFunction<WHvGetCapabilityNative, WHvGetCapabilityDart>('WHvGetCapability');
// CapabilityCode : WHV_CAPABILITY_CODE -> Int32
// CapabilityBuffer : void* out -> Pointer<Void>
// CapabilityBufferSizeInBytes : DWORD -> Uint32
// WrittenSizeInBytes : DWORD* optional, out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function WHvGetCapability(
  CapabilityCode: Integer;   // WHV_CAPABILITY_CODE
  CapabilityBuffer: Pointer;   // void* out
  CapabilityBufferSizeInBytes: DWORD;   // DWORD
  WrittenSizeInBytes: Pointer   // DWORD* optional, out
): Integer; stdcall;
  external 'WinHvPlatform.dll' name 'WHvGetCapability';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "WHvGetCapability"
  c_WHvGetCapability :: Int32 -> Ptr () -> Word32 -> Ptr Word32 -> IO Int32
-- CapabilityCode : WHV_CAPABILITY_CODE -> Int32
-- CapabilityBuffer : void* out -> Ptr ()
-- CapabilityBufferSizeInBytes : DWORD -> Word32
-- WrittenSizeInBytes : DWORD* optional, out -> Ptr Word32
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let whvgetcapability =
  foreign "WHvGetCapability"
    (int32_t @-> (ptr void) @-> uint32_t @-> (ptr uint32_t) @-> returning int32_t)
(* CapabilityCode : WHV_CAPABILITY_CODE -> int32_t *)
(* CapabilityBuffer : void* out -> (ptr void) *)
(* CapabilityBufferSizeInBytes : DWORD -> uint32_t *)
(* WrittenSizeInBytes : DWORD* optional, out -> (ptr uint32_t) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library winhvplatform (t "WinHvPlatform.dll"))
(cffi:use-foreign-library winhvplatform)

(cffi:defcfun ("WHvGetCapability" whv-get-capability :convention :stdcall) :int32
  (capability-code :int32)   ; WHV_CAPABILITY_CODE
  (capability-buffer :pointer)   ; void* out
  (capability-buffer-size-in-bytes :uint32)   ; DWORD
  (written-size-in-bytes :pointer))   ; DWORD* optional, out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $WHvGetCapability = Win32::API::More->new('WinHvPlatform',
    'int WHvGetCapability(int CapabilityCode, LPVOID CapabilityBuffer, DWORD CapabilityBufferSizeInBytes, LPVOID WrittenSizeInBytes)');
# my $ret = $WHvGetCapability->Call($CapabilityCode, $CapabilityBuffer, $CapabilityBufferSizeInBytes, $WrittenSizeInBytes);
# CapabilityCode : WHV_CAPABILITY_CODE -> int
# CapabilityBuffer : void* out -> LPVOID
# CapabilityBufferSizeInBytes : DWORD -> DWORD
# WrittenSizeInBytes : DWORD* optional, out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。