FtpGetCurrentDirectoryA

// WININET.dll  (ANSI / -A)
#include <windows.h>

BOOL FtpGetCurrentDirectoryA(
    void* hConnect,
    LPSTR lpszCurrentDirectory,
    DWORD* lpdwCurrentDirectory
);

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

' hConnect : void*
' lpszCurrentDirectory : LPSTR out
' lpdwCurrentDirectory : DWORD* in/out
Declare PtrSafe Function FtpGetCurrentDirectoryA Lib "wininet" ( _
    ByVal hConnect As LongPtr, _
    ByVal lpszCurrentDirectory As String, _
    ByRef lpdwCurrentDirectory As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

FtpGetCurrentDirectoryA = ctypes.windll.wininet.FtpGetCurrentDirectoryA
FtpGetCurrentDirectoryA.restype = wintypes.BOOL
FtpGetCurrentDirectoryA.argtypes = [
    ctypes.POINTER(None),  # hConnect : void*
    wintypes.LPSTR,  # lpszCurrentDirectory : LPSTR 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')
FtpGetCurrentDirectoryA = Fiddle::Function.new(
  lib['FtpGetCurrentDirectoryA'],
  [
    Fiddle::TYPE_VOIDP,  # hConnect : void*
    Fiddle::TYPE_VOIDP,  # lpszCurrentDirectory : LPSTR out
    Fiddle::TYPE_VOIDP,  # lpdwCurrentDirectory : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "wininet")]
extern "system" {
    fn FtpGetCurrentDirectoryA(
        hConnect: *mut (),  // void*
        lpszCurrentDirectory: *mut u8,  // LPSTR 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.Ansi, SetLastError = true)]
public static extern bool FtpGetCurrentDirectoryA(IntPtr hConnect, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder lpszCurrentDirectory, ref uint lpdwCurrentDirectory);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_FtpGetCurrentDirectoryA' -Namespace Win32 -PassThru
# $api::FtpGetCurrentDirectoryA(hConnect, lpszCurrentDirectory, lpdwCurrentDirectory)

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

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

function FtpGetCurrentDirectoryA(
  hConnect: Pointer;   // void*
  lpszCurrentDirectory: PAnsiChar;   // LPSTR out
  lpdwCurrentDirectory: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'WININET.dll' name 'FtpGetCurrentDirectoryA';

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

●FtpGetCurrentDirectoryA(hConnect, lpszCurrentDirectory, lpdwCurrentDirectory) = DLL("WININET.dll", "bool FtpGetCurrentDirectoryA(void*, char*, void*)")
# 呼び出し: FtpGetCurrentDirectoryA(hConnect, lpszCurrentDirectory, lpdwCurrentDirectory)
# hConnect : void* -> "void*"
# lpszCurrentDirectory : LPSTR 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)。