PROTOCOL_INFOA

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct PROTOCOL_INFOA
{
    public uint dwServiceFlags;
    public int iAddressFamily;
    public int iMaxSockAddr;
    public int iMinSockAddr;
    public int iSocketType;
    public int iProtocol;
    public uint dwMessageSize;
    public IntPtr lpProtocol;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure PROTOCOL_INFOA
    Public dwServiceFlags As UInteger
    Public iAddressFamily As Integer
    Public iMaxSockAddr As Integer
    Public iMinSockAddr As Integer
    Public iSocketType As Integer
    Public iProtocol As Integer
    Public dwMessageSize As UInteger
    Public lpProtocol As IntPtr
End Structure

import ctypes
from ctypes import wintypes

class PROTOCOL_INFOA(ctypes.Structure):
    _fields_ = [
        ("dwServiceFlags", wintypes.DWORD),
        ("iAddressFamily", ctypes.c_int),
        ("iMaxSockAddr", ctypes.c_int),
        ("iMinSockAddr", ctypes.c_int),
        ("iSocketType", ctypes.c_int),
        ("iProtocol", ctypes.c_int),
        ("dwMessageSize", wintypes.DWORD),
        ("lpProtocol", ctypes.c_void_p),
    ]

#[repr(C)]
pub struct PROTOCOL_INFOA {
    pub dwServiceFlags: u32,
    pub iAddressFamily: i32,
    pub iMaxSockAddr: i32,
    pub iMinSockAddr: i32,
    pub iSocketType: i32,
    pub iProtocol: i32,
    pub dwMessageSize: u32,
    pub lpProtocol: *mut core::ffi::c_void,
}

import "golang.org/x/sys/windows"

type PROTOCOL_INFOA struct {
	dwServiceFlags uint32
	iAddressFamily int32
	iMaxSockAddr int32
	iMinSockAddr int32
	iSocketType int32
	iProtocol int32
	dwMessageSize uint32
	lpProtocol uintptr
}

type
  PROTOCOL_INFOA = record
    dwServiceFlags: DWORD;
    iAddressFamily: Integer;
    iMaxSockAddr: Integer;
    iMinSockAddr: Integer;
    iSocketType: Integer;
    iProtocol: Integer;
    dwMessageSize: DWORD;
    lpProtocol: Pointer;
  end;

const PROTOCOL_INFOA = extern struct {
    dwServiceFlags: u32,
    iAddressFamily: i32,
    iMaxSockAddr: i32,
    iMinSockAddr: i32,
    iSocketType: i32,
    iProtocol: i32,
    dwMessageSize: u32,
    lpProtocol: ?*anyopaque,
};

type
  PROTOCOL_INFOA {.bycopy.} = object
    dwServiceFlags: uint32
    iAddressFamily: int32
    iMaxSockAddr: int32
    iMinSockAddr: int32
    iSocketType: int32
    iProtocol: int32
    dwMessageSize: uint32
    lpProtocol: pointer

struct PROTOCOL_INFOA
{
    uint dwServiceFlags;
    int iAddressFamily;
    int iMaxSockAddr;
    int iMinSockAddr;
    int iSocketType;
    int iProtocol;
    uint dwMessageSize;
    void* lpProtocol;
}