HcsAttachOverlayFilter

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

HRESULT HcsAttachOverlayFilter(
    LPCWSTR VolumeMountPoint,
    LPCWSTR LayerData
);

<DllImport("computestorage.dll", ExactSpelling:=True)>
Public Shared Function HcsAttachOverlayFilter(
    <MarshalAs(UnmanagedType.LPWStr)> VolumeMountPoint As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> LayerData As String   ' LPCWSTR
) As Integer
End Function

' VolumeMountPoint : LPCWSTR
' LayerData : LPCWSTR
Declare PtrSafe Function HcsAttachOverlayFilter Lib "computestorage" ( _
    ByVal VolumeMountPoint As LongPtr, _
    ByVal LayerData 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

HcsAttachOverlayFilter = ctypes.windll.computestorage.HcsAttachOverlayFilter
HcsAttachOverlayFilter.restype = ctypes.c_int
HcsAttachOverlayFilter.argtypes = [
    wintypes.LPCWSTR,  # VolumeMountPoint : LPCWSTR
    wintypes.LPCWSTR,  # LayerData : LPCWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('computestorage.dll')
HcsAttachOverlayFilter = Fiddle::Function.new(
  lib['HcsAttachOverlayFilter'],
  [
    Fiddle::TYPE_VOIDP,  # VolumeMountPoint : LPCWSTR
    Fiddle::TYPE_VOIDP,  # LayerData : LPCWSTR
  ],
  Fiddle::TYPE_INT)

#[link(name = "computestorage")]
extern "system" {
    fn HcsAttachOverlayFilter(
        VolumeMountPoint: *const u16,  // LPCWSTR
        LayerData: *const u16  // LPCWSTR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("computestorage.dll")]
public static extern int HcsAttachOverlayFilter([MarshalAs(UnmanagedType.LPWStr)] string VolumeMountPoint, [MarshalAs(UnmanagedType.LPWStr)] string LayerData);
"@
$api = Add-Type -MemberDefinition $sig -Name 'computestorage_HcsAttachOverlayFilter' -Namespace Win32 -PassThru
# $api::HcsAttachOverlayFilter(VolumeMountPoint, LayerData)

#uselib "computestorage.dll"
#func global HcsAttachOverlayFilter "HcsAttachOverlayFilter" sptr, sptr
; HcsAttachOverlayFilter VolumeMountPoint, LayerData   ; 戻り値は stat
; VolumeMountPoint : LPCWSTR -> "sptr"
; LayerData : LPCWSTR -> "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 "computestorage.dll"
#cfunc global HcsAttachOverlayFilter "HcsAttachOverlayFilter" wstr, wstr
; res = HcsAttachOverlayFilter(VolumeMountPoint, LayerData)
; VolumeMountPoint : LPCWSTR -> "wstr"
; LayerData : LPCWSTR -> "wstr"

; HRESULT HcsAttachOverlayFilter(LPCWSTR VolumeMountPoint, LPCWSTR LayerData)
#uselib "computestorage.dll"
#cfunc global HcsAttachOverlayFilter "HcsAttachOverlayFilter" wstr, wstr
; res = HcsAttachOverlayFilter(VolumeMountPoint, LayerData)
; VolumeMountPoint : LPCWSTR -> "wstr"
; LayerData : LPCWSTR -> "wstr"

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

var (
	computestorage = windows.NewLazySystemDLL("computestorage.dll")
	procHcsAttachOverlayFilter = computestorage.NewProc("HcsAttachOverlayFilter")
)

// VolumeMountPoint (LPCWSTR), LayerData (LPCWSTR)
r1, _, err := procHcsAttachOverlayFilter.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(VolumeMountPoint))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(LayerData))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function HcsAttachOverlayFilter(
  VolumeMountPoint: PWideChar;   // LPCWSTR
  LayerData: PWideChar   // LPCWSTR
): Integer; stdcall;
  external 'computestorage.dll' name 'HcsAttachOverlayFilter';

result := DllCall("computestorage\HcsAttachOverlayFilter"
    , "WStr", VolumeMountPoint   ; LPCWSTR
    , "WStr", LayerData   ; LPCWSTR
    , "Int")   ; return: HRESULT

●HcsAttachOverlayFilter(VolumeMountPoint, LayerData) = DLL("computestorage.dll", "int HcsAttachOverlayFilter(char*, char*)")
# 呼び出し: HcsAttachOverlayFilter(VolumeMountPoint, LayerData)
# VolumeMountPoint : LPCWSTR -> "char*"
# LayerData : LPCWSTR -> "char*"
# 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)。