FtpCreateDirectoryW

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

BOOL FtpCreateDirectoryW(
    void* hConnect,
    LPCWSTR lpszDirectory
);

<DllImport("WININET.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function FtpCreateDirectoryW(
    hConnect As IntPtr,   ' void*
    <MarshalAs(UnmanagedType.LPWStr)> lpszDirectory As String   ' LPCWSTR
) As Boolean
End Function

' hConnect : void*
' lpszDirectory : LPCWSTR
Declare PtrSafe Function FtpCreateDirectoryW Lib "wininet" ( _
    ByVal hConnect As LongPtr, _
    ByVal lpszDirectory 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

FtpCreateDirectoryW = ctypes.windll.wininet.FtpCreateDirectoryW
FtpCreateDirectoryW.restype = wintypes.BOOL
FtpCreateDirectoryW.argtypes = [
    ctypes.POINTER(None),  # hConnect : void*
    wintypes.LPCWSTR,  # lpszDirectory : LPCWSTR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
FtpCreateDirectoryW = Fiddle::Function.new(
  lib['FtpCreateDirectoryW'],
  [
    Fiddle::TYPE_VOIDP,  # hConnect : void*
    Fiddle::TYPE_VOIDP,  # lpszDirectory : LPCWSTR
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "wininet")]
extern "system" {
    fn FtpCreateDirectoryW(
        hConnect: *mut (),  // void*
        lpszDirectory: *const u16  // LPCWSTR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WININET.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool FtpCreateDirectoryW(IntPtr hConnect, [MarshalAs(UnmanagedType.LPWStr)] string lpszDirectory);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_FtpCreateDirectoryW' -Namespace Win32 -PassThru
# $api::FtpCreateDirectoryW(hConnect, lpszDirectory)

#uselib "WININET.dll"
#func global FtpCreateDirectoryW "FtpCreateDirectoryW" wptr, wptr
; FtpCreateDirectoryW hConnect, lpszDirectory   ; 戻り値は stat
; hConnect : void* -> "wptr"
; lpszDirectory : LPCWSTR -> "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 "WININET.dll"
#cfunc global FtpCreateDirectoryW "FtpCreateDirectoryW" sptr, wstr
; res = FtpCreateDirectoryW(hConnect, lpszDirectory)
; hConnect : void* -> "sptr"
; lpszDirectory : LPCWSTR -> "wstr"

; BOOL FtpCreateDirectoryW(void* hConnect, LPCWSTR lpszDirectory)
#uselib "WININET.dll"
#cfunc global FtpCreateDirectoryW "FtpCreateDirectoryW" intptr, wstr
; res = FtpCreateDirectoryW(hConnect, lpszDirectory)
; hConnect : void* -> "intptr"
; lpszDirectory : LPCWSTR -> "wstr"

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

var (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procFtpCreateDirectoryW = wininet.NewProc("FtpCreateDirectoryW")
)

// hConnect (void*), lpszDirectory (LPCWSTR)
r1, _, err := procFtpCreateDirectoryW.Call(
	uintptr(hConnect),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszDirectory))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function FtpCreateDirectoryW(
  hConnect: Pointer;   // void*
  lpszDirectory: PWideChar   // LPCWSTR
): BOOL; stdcall;
  external 'WININET.dll' name 'FtpCreateDirectoryW';

result := DllCall("WININET\FtpCreateDirectoryW"
    , "Ptr", hConnect   ; void*
    , "WStr", lpszDirectory   ; LPCWSTR
    , "Int")   ; return: BOOL

●FtpCreateDirectoryW(hConnect, lpszDirectory) = DLL("WININET.dll", "bool FtpCreateDirectoryW(void*, char*)")
# 呼び出し: FtpCreateDirectoryW(hConnect, lpszDirectory)
# hConnect : void* -> "void*"
# lpszDirectory : 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。