GetVirtualDiskMetadata

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

WIN32_ERROR GetVirtualDiskMetadata(
    HANDLE VirtualDiskHandle,
    const GUID* Item,
    DWORD* MetaDataSize,
    void* MetaData
);

<DllImport("VirtDisk.dll", ExactSpelling:=True)>
Public Shared Function GetVirtualDiskMetadata(
    VirtualDiskHandle As IntPtr,   ' HANDLE
    ByRef Item As Guid,   ' GUID*
    ByRef MetaDataSize As UInteger,   ' DWORD* in/out
    MetaData As IntPtr   ' void* out
) As UInteger
End Function

' VirtualDiskHandle : HANDLE
' Item : GUID*
' MetaDataSize : DWORD* in/out
' MetaData : void* out
Declare PtrSafe Function GetVirtualDiskMetadata Lib "virtdisk" ( _
    ByVal VirtualDiskHandle As LongPtr, _
    ByVal Item As LongPtr, _
    ByRef MetaDataSize As Long, _
    ByVal MetaData 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

GetVirtualDiskMetadata = ctypes.windll.virtdisk.GetVirtualDiskMetadata
GetVirtualDiskMetadata.restype = wintypes.DWORD
GetVirtualDiskMetadata.argtypes = [
    wintypes.HANDLE,  # VirtualDiskHandle : HANDLE
    ctypes.c_void_p,  # Item : GUID*
    ctypes.POINTER(wintypes.DWORD),  # MetaDataSize : DWORD* in/out
    ctypes.POINTER(None),  # MetaData : void* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('VirtDisk.dll')
GetVirtualDiskMetadata = Fiddle::Function.new(
  lib['GetVirtualDiskMetadata'],
  [
    Fiddle::TYPE_VOIDP,  # VirtualDiskHandle : HANDLE
    Fiddle::TYPE_VOIDP,  # Item : GUID*
    Fiddle::TYPE_VOIDP,  # MetaDataSize : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # MetaData : void* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "virtdisk")]
extern "system" {
    fn GetVirtualDiskMetadata(
        VirtualDiskHandle: *mut core::ffi::c_void,  // HANDLE
        Item: *const GUID,  // GUID*
        MetaDataSize: *mut u32,  // DWORD* in/out
        MetaData: *mut ()  // void* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("VirtDisk.dll")]
public static extern uint GetVirtualDiskMetadata(IntPtr VirtualDiskHandle, ref Guid Item, ref uint MetaDataSize, IntPtr MetaData);
"@
$api = Add-Type -MemberDefinition $sig -Name 'VirtDisk_GetVirtualDiskMetadata' -Namespace Win32 -PassThru
# $api::GetVirtualDiskMetadata(VirtualDiskHandle, Item, MetaDataSize, MetaData)

#uselib "VirtDisk.dll"
#func global GetVirtualDiskMetadata "GetVirtualDiskMetadata" sptr, sptr, sptr, sptr
; GetVirtualDiskMetadata VirtualDiskHandle, varptr(Item), varptr(MetaDataSize), MetaData   ; 戻り値は stat
; VirtualDiskHandle : HANDLE -> "sptr"
; Item : GUID* -> "sptr"
; MetaDataSize : DWORD* in/out -> "sptr"
; MetaData : void* 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 "VirtDisk.dll"
#cfunc global GetVirtualDiskMetadata "GetVirtualDiskMetadata" sptr, var, var, sptr
; res = GetVirtualDiskMetadata(VirtualDiskHandle, Item, MetaDataSize, MetaData)
; VirtualDiskHandle : HANDLE -> "sptr"
; Item : GUID* -> "var"
; MetaDataSize : DWORD* in/out -> "var"
; MetaData : void* out -> "sptr"
; ※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。

; WIN32_ERROR GetVirtualDiskMetadata(HANDLE VirtualDiskHandle, GUID* Item, DWORD* MetaDataSize, void* MetaData)
#uselib "VirtDisk.dll"
#cfunc global GetVirtualDiskMetadata "GetVirtualDiskMetadata" intptr, var, var, intptr
; res = GetVirtualDiskMetadata(VirtualDiskHandle, Item, MetaDataSize, MetaData)
; VirtualDiskHandle : HANDLE -> "intptr"
; Item : GUID* -> "var"
; MetaDataSize : DWORD* in/out -> "var"
; MetaData : void* out -> "intptr"
; ※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 (
	virtdisk = windows.NewLazySystemDLL("VirtDisk.dll")
	procGetVirtualDiskMetadata = virtdisk.NewProc("GetVirtualDiskMetadata")
)

// VirtualDiskHandle (HANDLE), Item (GUID*), MetaDataSize (DWORD* in/out), MetaData (void* out)
r1, _, err := procGetVirtualDiskMetadata.Call(
	uintptr(VirtualDiskHandle),
	uintptr(Item),
	uintptr(MetaDataSize),
	uintptr(MetaData),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function GetVirtualDiskMetadata(
  VirtualDiskHandle: THandle;   // HANDLE
  Item: PGUID;   // GUID*
  MetaDataSize: Pointer;   // DWORD* in/out
  MetaData: Pointer   // void* out
): DWORD; stdcall;
  external 'VirtDisk.dll' name 'GetVirtualDiskMetadata';

result := DllCall("VirtDisk\GetVirtualDiskMetadata"
    , "Ptr", VirtualDiskHandle   ; HANDLE
    , "Ptr", Item   ; GUID*
    , "Ptr", MetaDataSize   ; DWORD* in/out
    , "Ptr", MetaData   ; void* out
    , "UInt")   ; return: WIN32_ERROR

●GetVirtualDiskMetadata(VirtualDiskHandle, Item, MetaDataSize, MetaData) = DLL("VirtDisk.dll", "dword GetVirtualDiskMetadata(void*, void*, void*, void*)")
# 呼び出し: GetVirtualDiskMetadata(VirtualDiskHandle, Item, MetaDataSize, MetaData)
# VirtualDiskHandle : HANDLE -> "void*"
# Item : GUID* -> "void*"
# MetaDataSize : DWORD* in/out -> "void*"
# MetaData : void* 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)。