HcsCreateEmptyGuestStateFile

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

HRESULT HcsCreateEmptyGuestStateFile(
    LPCWSTR guestStateFilePath
);

<DllImport("computecore.dll", ExactSpelling:=True)>
Public Shared Function HcsCreateEmptyGuestStateFile(
    <MarshalAs(UnmanagedType.LPWStr)> guestStateFilePath As String   ' LPCWSTR
) As Integer
End Function

' guestStateFilePath : LPCWSTR
Declare PtrSafe Function HcsCreateEmptyGuestStateFile Lib "computecore" ( _
    ByVal guestStateFilePath 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

HcsCreateEmptyGuestStateFile = ctypes.windll.computecore.HcsCreateEmptyGuestStateFile
HcsCreateEmptyGuestStateFile.restype = ctypes.c_int
HcsCreateEmptyGuestStateFile.argtypes = [
    wintypes.LPCWSTR,  # guestStateFilePath : LPCWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('computecore.dll')
HcsCreateEmptyGuestStateFile = Fiddle::Function.new(
  lib['HcsCreateEmptyGuestStateFile'],
  [
    Fiddle::TYPE_VOIDP,  # guestStateFilePath : LPCWSTR
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("computecore.dll")]
public static extern int HcsCreateEmptyGuestStateFile([MarshalAs(UnmanagedType.LPWStr)] string guestStateFilePath);
"@
$api = Add-Type -MemberDefinition $sig -Name 'computecore_HcsCreateEmptyGuestStateFile' -Namespace Win32 -PassThru
# $api::HcsCreateEmptyGuestStateFile(guestStateFilePath)

#uselib "computecore.dll"
#func global HcsCreateEmptyGuestStateFile "HcsCreateEmptyGuestStateFile" sptr
; HcsCreateEmptyGuestStateFile guestStateFilePath   ; 戻り値は stat
; guestStateFilePath : 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 "computecore.dll"
#cfunc global HcsCreateEmptyGuestStateFile "HcsCreateEmptyGuestStateFile" wstr
; res = HcsCreateEmptyGuestStateFile(guestStateFilePath)
; guestStateFilePath : LPCWSTR -> "wstr"

; HRESULT HcsCreateEmptyGuestStateFile(LPCWSTR guestStateFilePath)
#uselib "computecore.dll"
#cfunc global HcsCreateEmptyGuestStateFile "HcsCreateEmptyGuestStateFile" wstr
; res = HcsCreateEmptyGuestStateFile(guestStateFilePath)
; guestStateFilePath : LPCWSTR -> "wstr"

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

var (
	computecore = windows.NewLazySystemDLL("computecore.dll")
	procHcsCreateEmptyGuestStateFile = computecore.NewProc("HcsCreateEmptyGuestStateFile")
)

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

function HcsCreateEmptyGuestStateFile(
  guestStateFilePath: PWideChar   // LPCWSTR
): Integer; stdcall;
  external 'computecore.dll' name 'HcsCreateEmptyGuestStateFile';

result := DllCall("computecore\HcsCreateEmptyGuestStateFile"
    , "WStr", guestStateFilePath   ; LPCWSTR
    , "Int")   ; return: HRESULT

●HcsCreateEmptyGuestStateFile(guestStateFilePath) = DLL("computecore.dll", "int HcsCreateEmptyGuestStateFile(char*)")
# 呼び出し: HcsCreateEmptyGuestStateFile(guestStateFilePath)
# guestStateFilePath : 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)。