FWPM_CALLOUT0

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct FWPM_DISPLAY_DATA0
{
    public IntPtr name;
    public IntPtr description;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct FWP_BYTE_BLOB
{
    public uint size;
    public IntPtr data;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct FWPM_CALLOUT0
{
    public Guid calloutKey;
    public FWPM_DISPLAY_DATA0 displayData;
    public uint flags;
    public IntPtr providerKey;
    public FWP_BYTE_BLOB providerData;
    public Guid applicableLayer;
    public uint calloutId;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure FWPM_DISPLAY_DATA0
    Public name As IntPtr
    Public description As IntPtr
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure FWP_BYTE_BLOB
    Public size As UInteger
    Public data As IntPtr
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure FWPM_CALLOUT0
    Public calloutKey As Guid
    Public displayData As FWPM_DISPLAY_DATA0
    Public flags As UInteger
    Public providerKey As IntPtr
    Public providerData As FWP_BYTE_BLOB
    Public applicableLayer As Guid
    Public calloutId As UInteger
End Structure

import ctypes
from ctypes import wintypes

class FWPM_DISPLAY_DATA0(ctypes.Structure):
    _fields_ = [
        ("name", ctypes.c_void_p),
        ("description", ctypes.c_void_p),
    ]

class FWP_BYTE_BLOB(ctypes.Structure):
    _fields_ = [
        ("size", wintypes.DWORD),
        ("data", ctypes.c_void_p),
    ]

class FWPM_CALLOUT0(ctypes.Structure):
    _fields_ = [
        ("calloutKey", GUID),
        ("displayData", FWPM_DISPLAY_DATA0),
        ("flags", wintypes.DWORD),
        ("providerKey", ctypes.c_void_p),
        ("providerData", FWP_BYTE_BLOB),
        ("applicableLayer", GUID),
        ("calloutId", wintypes.DWORD),
    ]

#[repr(C)]
pub struct FWPM_DISPLAY_DATA0 {
    pub name: *mut core::ffi::c_void,
    pub description: *mut core::ffi::c_void,
}

#[repr(C)]
pub struct FWP_BYTE_BLOB {
    pub size: u32,
    pub data: *mut core::ffi::c_void,
}

#[repr(C)]
pub struct FWPM_CALLOUT0 {
    pub calloutKey: GUID,
    pub displayData: FWPM_DISPLAY_DATA0,
    pub flags: u32,
    pub providerKey: *mut core::ffi::c_void,
    pub providerData: FWP_BYTE_BLOB,
    pub applicableLayer: GUID,
    pub calloutId: u32,
}

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

type FWPM_DISPLAY_DATA0 struct {
	name uintptr
	description uintptr
}

type FWP_BYTE_BLOB struct {
	size uint32
	data uintptr
}

type FWPM_CALLOUT0 struct {
	calloutKey windows.GUID
	displayData FWPM_DISPLAY_DATA0
	flags uint32
	providerKey uintptr
	providerData FWP_BYTE_BLOB
	applicableLayer windows.GUID
	calloutId uint32
}

type
  FWPM_DISPLAY_DATA0 = record
    name: Pointer;
    description: Pointer;
  end;

  FWP_BYTE_BLOB = record
    size: DWORD;
    data: Pointer;
  end;

  FWPM_CALLOUT0 = record
    calloutKey: TGUID;
    displayData: FWPM_DISPLAY_DATA0;
    flags: DWORD;
    providerKey: Pointer;
    providerData: FWP_BYTE_BLOB;
    applicableLayer: TGUID;
    calloutId: DWORD;
  end;

const FWPM_DISPLAY_DATA0 = extern struct {
    name: ?*anyopaque,
    description: ?*anyopaque,
};

const FWP_BYTE_BLOB = extern struct {
    size: u32,
    data: ?*anyopaque,
};

const FWPM_CALLOUT0 = extern struct {
    calloutKey: GUID,
    displayData: FWPM_DISPLAY_DATA0,
    flags: u32,
    providerKey: ?*anyopaque,
    providerData: FWP_BYTE_BLOB,
    applicableLayer: GUID,
    calloutId: u32,
};

type
  FWPM_DISPLAY_DATA0 {.bycopy.} = object
    name: pointer
    description: pointer

  FWP_BYTE_BLOB {.bycopy.} = object
    size: uint32
    data: pointer

  FWPM_CALLOUT0 {.bycopy.} = object
    calloutKey: GUID
    displayData: FWPM_DISPLAY_DATA0
    flags: uint32
    providerKey: pointer
    providerData: FWP_BYTE_BLOB
    applicableLayer: GUID
    calloutId: uint32

struct FWPM_DISPLAY_DATA0
{
    void* name;
    void* description;
}

struct FWP_BYTE_BLOB
{
    uint size;
    void* data;
}

struct FWPM_CALLOUT0
{
    GUID calloutKey;
    FWPM_DISPLAY_DATA0 displayData;
    uint flags;
    void* providerKey;
    FWP_BYTE_BLOB providerData;
    GUID applicableLayer;
    uint calloutId;
}