GetVirtualDiskInformation

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

WIN32_ERROR GetVirtualDiskInformation(
    HANDLE VirtualDiskHandle,
    DWORD* VirtualDiskInfoSize,
    GET_VIRTUAL_DISK_INFO* VirtualDiskInfo,
    DWORD* SizeUsed   // optional
);

<DllImport("VirtDisk.dll", ExactSpelling:=True)>
Public Shared Function GetVirtualDiskInformation(
    VirtualDiskHandle As IntPtr,   ' HANDLE
    ByRef VirtualDiskInfoSize As UInteger,   ' DWORD* in/out
    VirtualDiskInfo As IntPtr,   ' GET_VIRTUAL_DISK_INFO* in/out
    SizeUsed As IntPtr   ' DWORD* optional, out
) As UInteger
End Function

' VirtualDiskHandle : HANDLE
' VirtualDiskInfoSize : DWORD* in/out
' VirtualDiskInfo : GET_VIRTUAL_DISK_INFO* in/out
' SizeUsed : DWORD* optional, out
Declare PtrSafe Function GetVirtualDiskInformation Lib "virtdisk" ( _
    ByVal VirtualDiskHandle As LongPtr, _
    ByRef VirtualDiskInfoSize As Long, _
    ByVal VirtualDiskInfo As LongPtr, _
    ByVal SizeUsed 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

GetVirtualDiskInformation = ctypes.windll.virtdisk.GetVirtualDiskInformation
GetVirtualDiskInformation.restype = wintypes.DWORD
GetVirtualDiskInformation.argtypes = [
    wintypes.HANDLE,  # VirtualDiskHandle : HANDLE
    ctypes.POINTER(wintypes.DWORD),  # VirtualDiskInfoSize : DWORD* in/out
    ctypes.c_void_p,  # VirtualDiskInfo : GET_VIRTUAL_DISK_INFO* in/out
    ctypes.POINTER(wintypes.DWORD),  # SizeUsed : DWORD* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('VirtDisk.dll')
GetVirtualDiskInformation = Fiddle::Function.new(
  lib['GetVirtualDiskInformation'],
  [
    Fiddle::TYPE_VOIDP,  # VirtualDiskHandle : HANDLE
    Fiddle::TYPE_VOIDP,  # VirtualDiskInfoSize : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # VirtualDiskInfo : GET_VIRTUAL_DISK_INFO* in/out
    Fiddle::TYPE_VOIDP,  # SizeUsed : DWORD* optional, out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "virtdisk")]
extern "system" {
    fn GetVirtualDiskInformation(
        VirtualDiskHandle: *mut core::ffi::c_void,  // HANDLE
        VirtualDiskInfoSize: *mut u32,  // DWORD* in/out
        VirtualDiskInfo: *mut GET_VIRTUAL_DISK_INFO,  // GET_VIRTUAL_DISK_INFO* in/out
        SizeUsed: *mut u32  // DWORD* optional, out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("VirtDisk.dll")]
public static extern uint GetVirtualDiskInformation(IntPtr VirtualDiskHandle, ref uint VirtualDiskInfoSize, IntPtr VirtualDiskInfo, IntPtr SizeUsed);
"@
$api = Add-Type -MemberDefinition $sig -Name 'VirtDisk_GetVirtualDiskInformation' -Namespace Win32 -PassThru
# $api::GetVirtualDiskInformation(VirtualDiskHandle, VirtualDiskInfoSize, VirtualDiskInfo, SizeUsed)

#uselib "VirtDisk.dll"
#func global GetVirtualDiskInformation "GetVirtualDiskInformation" sptr, sptr, sptr, sptr
; GetVirtualDiskInformation VirtualDiskHandle, varptr(VirtualDiskInfoSize), varptr(VirtualDiskInfo), varptr(SizeUsed)   ; 戻り値は stat
; VirtualDiskHandle : HANDLE -> "sptr"
; VirtualDiskInfoSize : DWORD* in/out -> "sptr"
; VirtualDiskInfo : GET_VIRTUAL_DISK_INFO* in/out -> "sptr"
; SizeUsed : 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。

#uselib "VirtDisk.dll"
#cfunc global GetVirtualDiskInformation "GetVirtualDiskInformation" sptr, var, var, var
; res = GetVirtualDiskInformation(VirtualDiskHandle, VirtualDiskInfoSize, VirtualDiskInfo, SizeUsed)
; VirtualDiskHandle : HANDLE -> "sptr"
; VirtualDiskInfoSize : DWORD* in/out -> "var"
; VirtualDiskInfo : GET_VIRTUAL_DISK_INFO* in/out -> "var"
; SizeUsed : DWORD* optional, 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。

; WIN32_ERROR GetVirtualDiskInformation(HANDLE VirtualDiskHandle, DWORD* VirtualDiskInfoSize, GET_VIRTUAL_DISK_INFO* VirtualDiskInfo, DWORD* SizeUsed)
#uselib "VirtDisk.dll"
#cfunc global GetVirtualDiskInformation "GetVirtualDiskInformation" intptr, var, var, var
; res = GetVirtualDiskInformation(VirtualDiskHandle, VirtualDiskInfoSize, VirtualDiskInfo, SizeUsed)
; VirtualDiskHandle : HANDLE -> "intptr"
; VirtualDiskInfoSize : DWORD* in/out -> "var"
; VirtualDiskInfo : GET_VIRTUAL_DISK_INFO* in/out -> "var"
; SizeUsed : DWORD* optional, 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 (
	virtdisk = windows.NewLazySystemDLL("VirtDisk.dll")
	procGetVirtualDiskInformation = virtdisk.NewProc("GetVirtualDiskInformation")
)

// VirtualDiskHandle (HANDLE), VirtualDiskInfoSize (DWORD* in/out), VirtualDiskInfo (GET_VIRTUAL_DISK_INFO* in/out), SizeUsed (DWORD* optional, out)
r1, _, err := procGetVirtualDiskInformation.Call(
	uintptr(VirtualDiskHandle),
	uintptr(VirtualDiskInfoSize),
	uintptr(VirtualDiskInfo),
	uintptr(SizeUsed),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function GetVirtualDiskInformation(
  VirtualDiskHandle: THandle;   // HANDLE
  VirtualDiskInfoSize: Pointer;   // DWORD* in/out
  VirtualDiskInfo: Pointer;   // GET_VIRTUAL_DISK_INFO* in/out
  SizeUsed: Pointer   // DWORD* optional, out
): DWORD; stdcall;
  external 'VirtDisk.dll' name 'GetVirtualDiskInformation';

result := DllCall("VirtDisk\GetVirtualDiskInformation"
    , "Ptr", VirtualDiskHandle   ; HANDLE
    , "Ptr", VirtualDiskInfoSize   ; DWORD* in/out
    , "Ptr", VirtualDiskInfo   ; GET_VIRTUAL_DISK_INFO* in/out
    , "Ptr", SizeUsed   ; DWORD* optional, out
    , "UInt")   ; return: WIN32_ERROR

●GetVirtualDiskInformation(VirtualDiskHandle, VirtualDiskInfoSize, VirtualDiskInfo, SizeUsed) = DLL("VirtDisk.dll", "dword GetVirtualDiskInformation(void*, void*, void*, void*)")
# 呼び出し: GetVirtualDiskInformation(VirtualDiskHandle, VirtualDiskInfoSize, VirtualDiskInfo, SizeUsed)
# VirtualDiskHandle : HANDLE -> "void*"
# VirtualDiskInfoSize : DWORD* in/out -> "void*"
# VirtualDiskInfo : GET_VIRTUAL_DISK_INFO* in/out -> "void*"
# SizeUsed : 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)。