FtpGetCurrentDirectoryW

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

BOOL FtpGetCurrentDirectoryW(
    void* hConnect,
    LPWSTR lpszCurrentDirectory,
    DWORD* lpdwCurrentDirectory
);

<DllImport("WININET.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function FtpGetCurrentDirectoryW(
    hConnect As IntPtr,   ' void*
    <MarshalAs(UnmanagedType.LPWStr)> lpszCurrentDirectory As System.Text.StringBuilder,   ' LPWSTR out
    ByRef lpdwCurrentDirectory As UInteger   ' DWORD* in/out
) As Boolean
End Function

' hConnect : void*
' lpszCurrentDirectory : LPWSTR out
' lpdwCurrentDirectory : DWORD* in/out
Declare PtrSafe Function FtpGetCurrentDirectoryW Lib "wininet" ( _
    ByVal hConnect As LongPtr, _
    ByVal lpszCurrentDirectory As LongPtr, _
    ByRef lpdwCurrentDirectory As Long) 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

FtpGetCurrentDirectoryW = ctypes.windll.wininet.FtpGetCurrentDirectoryW
FtpGetCurrentDirectoryW.restype = wintypes.BOOL
FtpGetCurrentDirectoryW.argtypes = [
    ctypes.POINTER(None),  # hConnect : void*
    wintypes.LPWSTR,  # lpszCurrentDirectory : LPWSTR out
    ctypes.POINTER(wintypes.DWORD),  # lpdwCurrentDirectory : DWORD* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
FtpGetCurrentDirectoryW = Fiddle::Function.new(
  lib['FtpGetCurrentDirectoryW'],
  [
    Fiddle::TYPE_VOIDP,  # hConnect : void*
    Fiddle::TYPE_VOIDP,  # lpszCurrentDirectory : LPWSTR out
    Fiddle::TYPE_VOIDP,  # lpdwCurrentDirectory : DWORD* in/out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "wininet")]
extern "system" {
    fn FtpGetCurrentDirectoryW(
        hConnect: *mut (),  // void*
        lpszCurrentDirectory: *mut u16,  // LPWSTR out
        lpdwCurrentDirectory: *mut u32  // DWORD* in/out
    ) -> 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 FtpGetCurrentDirectoryW(IntPtr hConnect, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpszCurrentDirectory, ref uint lpdwCurrentDirectory);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_FtpGetCurrentDirectoryW' -Namespace Win32 -PassThru
# $api::FtpGetCurrentDirectoryW(hConnect, lpszCurrentDirectory, lpdwCurrentDirectory)

#uselib "WININET.dll"
#func global FtpGetCurrentDirectoryW "FtpGetCurrentDirectoryW" wptr, wptr, wptr
; FtpGetCurrentDirectoryW hConnect, varptr(lpszCurrentDirectory), varptr(lpdwCurrentDirectory)   ; 戻り値は stat
; hConnect : void* -> "wptr"
; lpszCurrentDirectory : LPWSTR out -> "wptr"
; lpdwCurrentDirectory : DWORD* in/out -> "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 FtpGetCurrentDirectoryW "FtpGetCurrentDirectoryW" sptr, var, var
; res = FtpGetCurrentDirectoryW(hConnect, lpszCurrentDirectory, lpdwCurrentDirectory)
; hConnect : void* -> "sptr"
; lpszCurrentDirectory : LPWSTR out -> "var"
; lpdwCurrentDirectory : DWORD* in/out -> "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 FtpGetCurrentDirectoryW(void* hConnect, LPWSTR lpszCurrentDirectory, DWORD* lpdwCurrentDirectory)
#uselib "WININET.dll"
#cfunc global FtpGetCurrentDirectoryW "FtpGetCurrentDirectoryW" intptr, var, var
; res = FtpGetCurrentDirectoryW(hConnect, lpszCurrentDirectory, lpdwCurrentDirectory)
; hConnect : void* -> "intptr"
; lpszCurrentDirectory : LPWSTR out -> "var"
; lpdwCurrentDirectory : DWORD* in/out -> "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 (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procFtpGetCurrentDirectoryW = wininet.NewProc("FtpGetCurrentDirectoryW")
)

// hConnect (void*), lpszCurrentDirectory (LPWSTR out), lpdwCurrentDirectory (DWORD* in/out)
r1, _, err := procFtpGetCurrentDirectoryW.Call(
	uintptr(hConnect),
	uintptr(lpszCurrentDirectory),
	uintptr(lpdwCurrentDirectory),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function FtpGetCurrentDirectoryW(
  hConnect: Pointer;   // void*
  lpszCurrentDirectory: PWideChar;   // LPWSTR out
  lpdwCurrentDirectory: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'WININET.dll' name 'FtpGetCurrentDirectoryW';

result := DllCall("WININET\FtpGetCurrentDirectoryW"
    , "Ptr", hConnect   ; void*
    , "Ptr", lpszCurrentDirectory   ; LPWSTR out
    , "Ptr", lpdwCurrentDirectory   ; DWORD* in/out
    , "Int")   ; return: BOOL

●FtpGetCurrentDirectoryW(hConnect, lpszCurrentDirectory, lpdwCurrentDirectory) = DLL("WININET.dll", "bool FtpGetCurrentDirectoryW(void*, char*, void*)")
# 呼び出し: FtpGetCurrentDirectoryW(hConnect, lpszCurrentDirectory, lpdwCurrentDirectory)
# hConnect : void* -> "void*"
# lpszCurrentDirectory : LPWSTR out -> "char*"
# lpdwCurrentDirectory : DWORD* in/out -> "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。