WSAGetLastError

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

WSA_ERROR WSAGetLastError(void);

<DllImport("WS2_32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WSAGetLastError() As Integer
End Function

Declare PtrSafe Function WSAGetLastError Lib "ws2_32" () As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

WSAGetLastError = ctypes.windll.ws2_32.WSAGetLastError
WSAGetLastError.restype = ctypes.c_int
WSAGetLastError.argtypes = []
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WS2_32.dll')
WSAGetLastError = Fiddle::Function.new(
  lib['WSAGetLastError'],
  [],
  Fiddle::TYPE_INT)

#[link(name = "ws2_32")]
extern "system" {
    fn WSAGetLastError() -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WS2_32.dll", SetLastError = true)]
public static extern int WSAGetLastError();
"@
$api = Add-Type -MemberDefinition $sig -Name 'WS2_32_WSAGetLastError' -Namespace Win32 -PassThru
# $api::WSAGetLastError()

#uselib "WS2_32.dll"
#func global WSAGetLastError "WSAGetLastError"
; WSAGetLastError   ; 戻り値は stat
; ※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 WSAGetLastError "WSAGetLastError"
; res = WSAGetLastError()

; WSA_ERROR WSAGetLastError()
#uselib "WS2_32.dll"
#cfunc global WSAGetLastError "WSAGetLastError"
; res = WSAGetLastError()

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

var (
	ws2_32 = windows.NewLazySystemDLL("WS2_32.dll")
	procWSAGetLastError = ws2_32.NewProc("WSAGetLastError")
)

r1, _, err := procWSAGetLastError.Call()
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WSA_ERROR

function WSAGetLastError: Integer; stdcall;
  external 'WS2_32.dll' name 'WSAGetLastError';

result := DllCall("WS2_32\WSAGetLastError", "Int")

●WSAGetLastError() = DLL("WS2_32.dll", "int WSAGetLastError()")
# 呼び出し: WSAGetLastError()
# 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)。