CreateDirectoryExW

// KERNEL32.dll  (Unicode / -W)
#include <windows.h>

BOOL CreateDirectoryExW(
    LPCWSTR lpTemplateDirectory,
    LPCWSTR lpNewDirectory,
    SECURITY_ATTRIBUTES* lpSecurityAttributes   // optional
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CreateDirectoryExW(
    <MarshalAs(UnmanagedType.LPWStr)> lpTemplateDirectory As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> lpNewDirectory As String,   ' LPCWSTR
    lpSecurityAttributes As IntPtr   ' SECURITY_ATTRIBUTES* optional
) As Boolean
End Function

' lpTemplateDirectory : LPCWSTR
' lpNewDirectory : LPCWSTR
' lpSecurityAttributes : SECURITY_ATTRIBUTES* optional
Declare PtrSafe Function CreateDirectoryExW Lib "kernel32" ( _
    ByVal lpTemplateDirectory As LongPtr, _
    ByVal lpNewDirectory As LongPtr, _
    ByVal lpSecurityAttributes As LongPtr) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CreateDirectoryExW = ctypes.windll.kernel32.CreateDirectoryExW
CreateDirectoryExW.restype = wintypes.BOOL
CreateDirectoryExW.argtypes = [
    wintypes.LPCWSTR,  # lpTemplateDirectory : LPCWSTR
    wintypes.LPCWSTR,  # lpNewDirectory : LPCWSTR
    ctypes.c_void_p,  # lpSecurityAttributes : SECURITY_ATTRIBUTES* optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
CreateDirectoryExW = Fiddle::Function.new(
  lib['CreateDirectoryExW'],
  [
    Fiddle::TYPE_VOIDP,  # lpTemplateDirectory : LPCWSTR
    Fiddle::TYPE_VOIDP,  # lpNewDirectory : LPCWSTR
    Fiddle::TYPE_VOIDP,  # lpSecurityAttributes : SECURITY_ATTRIBUTES* optional
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "kernel32")]
extern "system" {
    fn CreateDirectoryExW(
        lpTemplateDirectory: *const u16,  // LPCWSTR
        lpNewDirectory: *const u16,  // LPCWSTR
        lpSecurityAttributes: *mut SECURITY_ATTRIBUTES  // SECURITY_ATTRIBUTES* optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool CreateDirectoryExW([MarshalAs(UnmanagedType.LPWStr)] string lpTemplateDirectory, [MarshalAs(UnmanagedType.LPWStr)] string lpNewDirectory, IntPtr lpSecurityAttributes);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_CreateDirectoryExW' -Namespace Win32 -PassThru
# $api::CreateDirectoryExW(lpTemplateDirectory, lpNewDirectory, lpSecurityAttributes)

#uselib "KERNEL32.dll"
#func global CreateDirectoryExW "CreateDirectoryExW" wptr, wptr, wptr
; CreateDirectoryExW lpTemplateDirectory, lpNewDirectory, varptr(lpSecurityAttributes)   ; 戻り値は stat
; lpTemplateDirectory : LPCWSTR -> "wptr"
; lpNewDirectory : LPCWSTR -> "wptr"
; lpSecurityAttributes : SECURITY_ATTRIBUTES* optional -> "wptr"
; ※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 "KERNEL32.dll"
#cfunc global CreateDirectoryExW "CreateDirectoryExW" wstr, wstr, var
; res = CreateDirectoryExW(lpTemplateDirectory, lpNewDirectory, lpSecurityAttributes)
; lpTemplateDirectory : LPCWSTR -> "wstr"
; lpNewDirectory : LPCWSTR -> "wstr"
; lpSecurityAttributes : SECURITY_ATTRIBUTES* optional -> "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。

; BOOL CreateDirectoryExW(LPCWSTR lpTemplateDirectory, LPCWSTR lpNewDirectory, SECURITY_ATTRIBUTES* lpSecurityAttributes)
#uselib "KERNEL32.dll"
#cfunc global CreateDirectoryExW "CreateDirectoryExW" wstr, wstr, var
; res = CreateDirectoryExW(lpTemplateDirectory, lpNewDirectory, lpSecurityAttributes)
; lpTemplateDirectory : LPCWSTR -> "wstr"
; lpNewDirectory : LPCWSTR -> "wstr"
; lpSecurityAttributes : SECURITY_ATTRIBUTES* optional -> "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 (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procCreateDirectoryExW = kernel32.NewProc("CreateDirectoryExW")
)

// lpTemplateDirectory (LPCWSTR), lpNewDirectory (LPCWSTR), lpSecurityAttributes (SECURITY_ATTRIBUTES* optional)
r1, _, err := procCreateDirectoryExW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpTemplateDirectory))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpNewDirectory))),
	uintptr(lpSecurityAttributes),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CreateDirectoryExW(
  lpTemplateDirectory: PWideChar;   // LPCWSTR
  lpNewDirectory: PWideChar;   // LPCWSTR
  lpSecurityAttributes: Pointer   // SECURITY_ATTRIBUTES* optional
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'CreateDirectoryExW';

result := DllCall("KERNEL32\CreateDirectoryExW"
    , "WStr", lpTemplateDirectory   ; LPCWSTR
    , "WStr", lpNewDirectory   ; LPCWSTR
    , "Ptr", lpSecurityAttributes   ; SECURITY_ATTRIBUTES* optional
    , "Int")   ; return: BOOL

●CreateDirectoryExW(lpTemplateDirectory, lpNewDirectory, lpSecurityAttributes) = DLL("KERNEL32.dll", "bool CreateDirectoryExW(char*, char*, void*)")
# 呼び出し: CreateDirectoryExW(lpTemplateDirectory, lpNewDirectory, lpSecurityAttributes)
# lpTemplateDirectory : LPCWSTR -> "char*"
# lpNewDirectory : LPCWSTR -> "char*"
# lpSecurityAttributes : SECURITY_ATTRIBUTES* optional -> "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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。