SHCreateDirectoryExW

// SHELL32.dll  (Unicode / -W)
#include <windows.h>

INT SHCreateDirectoryExW(
    HWND hwnd,   // optional
    LPCWSTR pszPath,
    const SECURITY_ATTRIBUTES* psa   // optional
);

<DllImport("SHELL32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function SHCreateDirectoryExW(
    hwnd As IntPtr,   ' HWND optional
    <MarshalAs(UnmanagedType.LPWStr)> pszPath As String,   ' LPCWSTR
    psa As IntPtr   ' SECURITY_ATTRIBUTES* optional
) As Integer
End Function

' hwnd : HWND optional
' pszPath : LPCWSTR
' psa : SECURITY_ATTRIBUTES* optional
Declare PtrSafe Function SHCreateDirectoryExW Lib "shell32" ( _
    ByVal hwnd As LongPtr, _
    ByVal pszPath As LongPtr, _
    ByVal psa 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

SHCreateDirectoryExW = ctypes.windll.shell32.SHCreateDirectoryExW
SHCreateDirectoryExW.restype = ctypes.c_int
SHCreateDirectoryExW.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND optional
    wintypes.LPCWSTR,  # pszPath : LPCWSTR
    ctypes.c_void_p,  # psa : SECURITY_ATTRIBUTES* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHELL32.dll')
SHCreateDirectoryExW = Fiddle::Function.new(
  lib['SHCreateDirectoryExW'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND optional
    Fiddle::TYPE_VOIDP,  # pszPath : LPCWSTR
    Fiddle::TYPE_VOIDP,  # psa : SECURITY_ATTRIBUTES* optional
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "shell32")]
extern "system" {
    fn SHCreateDirectoryExW(
        hwnd: *mut core::ffi::c_void,  // HWND optional
        pszPath: *const u16,  // LPCWSTR
        psa: *const SECURITY_ATTRIBUTES  // SECURITY_ATTRIBUTES* optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHELL32.dll", CharSet = CharSet.Unicode)]
public static extern int SHCreateDirectoryExW(IntPtr hwnd, [MarshalAs(UnmanagedType.LPWStr)] string pszPath, IntPtr psa);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHELL32_SHCreateDirectoryExW' -Namespace Win32 -PassThru
# $api::SHCreateDirectoryExW(hwnd, pszPath, psa)

#uselib "SHELL32.dll"
#func global SHCreateDirectoryExW "SHCreateDirectoryExW" wptr, wptr, wptr
; SHCreateDirectoryExW hwnd, pszPath, varptr(psa)   ; 戻り値は stat
; hwnd : HWND optional -> "wptr"
; pszPath : LPCWSTR -> "wptr"
; psa : 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 "SHELL32.dll"
#cfunc global SHCreateDirectoryExW "SHCreateDirectoryExW" sptr, wstr, var
; res = SHCreateDirectoryExW(hwnd, pszPath, psa)
; hwnd : HWND optional -> "sptr"
; pszPath : LPCWSTR -> "wstr"
; psa : 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。

; INT SHCreateDirectoryExW(HWND hwnd, LPCWSTR pszPath, SECURITY_ATTRIBUTES* psa)
#uselib "SHELL32.dll"
#cfunc global SHCreateDirectoryExW "SHCreateDirectoryExW" intptr, wstr, var
; res = SHCreateDirectoryExW(hwnd, pszPath, psa)
; hwnd : HWND optional -> "intptr"
; pszPath : LPCWSTR -> "wstr"
; psa : 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 (
	shell32 = windows.NewLazySystemDLL("SHELL32.dll")
	procSHCreateDirectoryExW = shell32.NewProc("SHCreateDirectoryExW")
)

// hwnd (HWND optional), pszPath (LPCWSTR), psa (SECURITY_ATTRIBUTES* optional)
r1, _, err := procSHCreateDirectoryExW.Call(
	uintptr(hwnd),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszPath))),
	uintptr(psa),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SHCreateDirectoryExW(
  hwnd: THandle;   // HWND optional
  pszPath: PWideChar;   // LPCWSTR
  psa: Pointer   // SECURITY_ATTRIBUTES* optional
): Integer; stdcall;
  external 'SHELL32.dll' name 'SHCreateDirectoryExW';

result := DllCall("SHELL32\SHCreateDirectoryExW"
    , "Ptr", hwnd   ; HWND optional
    , "WStr", pszPath   ; LPCWSTR
    , "Ptr", psa   ; SECURITY_ATTRIBUTES* optional
    , "Int")   ; return: INT

●SHCreateDirectoryExW(hwnd, pszPath, psa) = DLL("SHELL32.dll", "int SHCreateDirectoryExW(void*, char*, void*)")
# 呼び出し: SHCreateDirectoryExW(hwnd, pszPath, psa)
# hwnd : HWND optional -> "void*"
# pszPath : LPCWSTR -> "char*"
# psa : 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。