WSASendDisconnect

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

INT WSASendDisconnect(
    SOCKET s,
    WSABUF* lpOutboundDisconnectData   // optional
);

<DllImport("WS2_32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WSASendDisconnect(
    s As UIntPtr,   ' SOCKET
    lpOutboundDisconnectData As IntPtr   ' WSABUF* optional
) As Integer
End Function

' s : SOCKET
' lpOutboundDisconnectData : WSABUF* optional
Declare PtrSafe Function WSASendDisconnect Lib "ws2_32" ( _
    ByVal s As LongPtr, _
    ByVal lpOutboundDisconnectData 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

WSASendDisconnect = ctypes.windll.ws2_32.WSASendDisconnect
WSASendDisconnect.restype = ctypes.c_int
WSASendDisconnect.argtypes = [
    ctypes.c_size_t,  # s : SOCKET
    ctypes.c_void_p,  # lpOutboundDisconnectData : WSABUF* optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WS2_32.dll')
WSASendDisconnect = Fiddle::Function.new(
  lib['WSASendDisconnect'],
  [
    Fiddle::TYPE_UINTPTR_T,  # s : SOCKET
    Fiddle::TYPE_VOIDP,  # lpOutboundDisconnectData : WSABUF* optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "ws2_32")]
extern "system" {
    fn WSASendDisconnect(
        s: usize,  // SOCKET
        lpOutboundDisconnectData: *mut WSABUF  // WSABUF* optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WS2_32.dll", SetLastError = true)]
public static extern int WSASendDisconnect(UIntPtr s, IntPtr lpOutboundDisconnectData);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WS2_32_WSASendDisconnect' -Namespace Win32 -PassThru
# $api::WSASendDisconnect(s, lpOutboundDisconnectData)

#uselib "WS2_32.dll"
#func global WSASendDisconnect "WSASendDisconnect" sptr, sptr
; WSASendDisconnect s, varptr(lpOutboundDisconnectData)   ; 戻り値は stat
; s : SOCKET -> "sptr"
; lpOutboundDisconnectData : WSABUF* optional -> "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 WSASendDisconnect "WSASendDisconnect" sptr, var
; res = WSASendDisconnect(s, lpOutboundDisconnectData)
; s : SOCKET -> "sptr"
; lpOutboundDisconnectData : WSABUF* optional -> "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。

; INT WSASendDisconnect(SOCKET s, WSABUF* lpOutboundDisconnectData)
#uselib "WS2_32.dll"
#cfunc global WSASendDisconnect "WSASendDisconnect" intptr, var
; res = WSASendDisconnect(s, lpOutboundDisconnectData)
; s : SOCKET -> "intptr"
; lpOutboundDisconnectData : WSABUF* optional -> "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 (
	ws2_32 = windows.NewLazySystemDLL("WS2_32.dll")
	procWSASendDisconnect = ws2_32.NewProc("WSASendDisconnect")
)

// s (SOCKET), lpOutboundDisconnectData (WSABUF* optional)
r1, _, err := procWSASendDisconnect.Call(
	uintptr(s),
	uintptr(lpOutboundDisconnectData),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function WSASendDisconnect(
  s: NativeUInt;   // SOCKET
  lpOutboundDisconnectData: Pointer   // WSABUF* optional
): Integer; stdcall;
  external 'WS2_32.dll' name 'WSASendDisconnect';

result := DllCall("WS2_32\WSASendDisconnect"
    , "UPtr", s   ; SOCKET
    , "Ptr", lpOutboundDisconnectData   ; WSABUF* optional
    , "Int")   ; return: INT

●WSASendDisconnect(s, lpOutboundDisconnectData) = DLL("WS2_32.dll", "int WSASendDisconnect(int, void*)")
# 呼び出し: WSASendDisconnect(s, lpOutboundDisconnectData)
# s : SOCKET -> "int"
# lpOutboundDisconnectData : WSABUF* optional -> "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)。