inet_pton

// WS2_32.dll
#include <windows.h>

INT inet_pton(
    INT Family,
    LPCSTR pszAddrString,
    void* pAddrBuf
);

<DllImport("WS2_32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function inet_pton(
    Family As Integer,   ' INT
    <MarshalAs(UnmanagedType.LPStr)> pszAddrString As String,   ' LPCSTR
    pAddrBuf As IntPtr   ' void* out
) As Integer
End Function

' Family : INT
' pszAddrString : LPCSTR
' pAddrBuf : void* out
Declare PtrSafe Function inet_pton Lib "ws2_32" ( _
    ByVal Family As Long, _
    ByVal pszAddrString As String, _
    ByVal pAddrBuf As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

inet_pton = ctypes.windll.ws2_32.inet_pton
inet_pton.restype = ctypes.c_int
inet_pton.argtypes = [
    ctypes.c_int,  # Family : INT
    wintypes.LPCSTR,  # pszAddrString : LPCSTR
    ctypes.POINTER(None),  # pAddrBuf : void* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WS2_32.dll')
inet_pton = Fiddle::Function.new(
  lib['inet_pton'],
  [
    Fiddle::TYPE_INT,  # Family : INT
    Fiddle::TYPE_VOIDP,  # pszAddrString : LPCSTR
    Fiddle::TYPE_VOIDP,  # pAddrBuf : void* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ws2_32")]
extern "system" {
    fn inet_pton(
        Family: i32,  // INT
        pszAddrString: *const u8,  // LPCSTR
        pAddrBuf: *mut ()  // void* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WS2_32.dll", SetLastError = true)]
public static extern int inet_pton(int Family, [MarshalAs(UnmanagedType.LPStr)] string pszAddrString, IntPtr pAddrBuf);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WS2_32_inet_pton' -Namespace Win32 -PassThru
# $api::inet_pton(Family, pszAddrString, pAddrBuf)

#uselib "WS2_32.dll"
#func global inet_pton "inet_pton" sptr, sptr, sptr
; inet_pton Family, pszAddrString, pAddrBuf   ; 戻り値は stat
; Family : INT -> "sptr"
; pszAddrString : LPCSTR -> "sptr"
; pAddrBuf : void* 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 "WS2_32.dll"
#cfunc global inet_pton "inet_pton" int, str, sptr
; res = inet_pton(Family, pszAddrString, pAddrBuf)
; Family : INT -> "int"
; pszAddrString : LPCSTR -> "str"
; pAddrBuf : void* out -> "sptr"

; INT inet_pton(INT Family, LPCSTR pszAddrString, void* pAddrBuf)
#uselib "WS2_32.dll"
#cfunc global inet_pton "inet_pton" int, str, intptr
; res = inet_pton(Family, pszAddrString, pAddrBuf)
; Family : INT -> "int"
; pszAddrString : LPCSTR -> "str"
; pAddrBuf : void* out -> "intptr"

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

var (
	ws2_32 = windows.NewLazySystemDLL("WS2_32.dll")
	procinet_pton = ws2_32.NewProc("inet_pton")
)

// Family (INT), pszAddrString (LPCSTR), pAddrBuf (void* out)
r1, _, err := procinet_pton.Call(
	uintptr(Family),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszAddrString))),
	uintptr(pAddrBuf),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function inet_pton(
  Family: Integer;   // INT
  pszAddrString: PAnsiChar;   // LPCSTR
  pAddrBuf: Pointer   // void* out
): Integer; stdcall;
  external 'WS2_32.dll' name 'inet_pton';

result := DllCall("WS2_32\inet_pton"
    , "Int", Family   ; INT
    , "AStr", pszAddrString   ; LPCSTR
    , "Ptr", pAddrBuf   ; void* out
    , "Int")   ; return: INT

●inet_pton(Family, pszAddrString, pAddrBuf) = DLL("WS2_32.dll", "int inet_pton(int, char*, void*)")
# 呼び出し: inet_pton(Family, pszAddrString, pAddrBuf)
# Family : INT -> "int"
# pszAddrString : LPCSTR -> "char*"
# pAddrBuf : void* 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)。