CRYPT_XML_DATA_PROVIDER

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct CRYPT_XML_DATA_PROVIDER
{
    public IntPtr pvCallbackState;
    public uint cbBufferSize;
    public IntPtr pfnRead;
    public IntPtr pfnClose;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure CRYPT_XML_DATA_PROVIDER
    Public pvCallbackState As IntPtr
    Public cbBufferSize As UInteger
    Public pfnRead As IntPtr
    Public pfnClose As IntPtr
End Structure

import ctypes
from ctypes import wintypes

class CRYPT_XML_DATA_PROVIDER(ctypes.Structure):
    _fields_ = [
        ("pvCallbackState", ctypes.c_void_p),
        ("cbBufferSize", wintypes.DWORD),
        ("pfnRead", ctypes.c_void_p),
        ("pfnClose", ctypes.c_void_p),
    ]

#[repr(C)]
pub struct CRYPT_XML_DATA_PROVIDER {
    pub pvCallbackState: *mut core::ffi::c_void,
    pub cbBufferSize: u32,
    pub pfnRead: *mut core::ffi::c_void,
    pub pfnClose: *mut core::ffi::c_void,
}

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

type CRYPT_XML_DATA_PROVIDER struct {
	pvCallbackState uintptr
	cbBufferSize uint32
	pfnRead uintptr
	pfnClose uintptr
}

type
  CRYPT_XML_DATA_PROVIDER = record
    pvCallbackState: Pointer;
    cbBufferSize: DWORD;
    pfnRead: Pointer;
    pfnClose: Pointer;
  end;

const CRYPT_XML_DATA_PROVIDER = extern struct {
    pvCallbackState: ?*anyopaque,
    cbBufferSize: u32,
    pfnRead: ?*anyopaque,
    pfnClose: ?*anyopaque,
};

type
  CRYPT_XML_DATA_PROVIDER {.bycopy.} = object
    pvCallbackState: pointer
    cbBufferSize: uint32
    pfnRead: pointer
    pfnClose: pointer

struct CRYPT_XML_DATA_PROVIDER
{
    void* pvCallbackState;
    uint cbBufferSize;
    void* pfnRead;
    void* pfnClose;
}