NMHDDISPINFOW

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct NMHDR
{
    public IntPtr hwndFrom;
    public UIntPtr idFrom;
    public uint code;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct NMHDDISPINFOW
{
    public NMHDR hdr;
    public int iItem;
    public uint mask;
    public IntPtr pszText;
    public int cchTextMax;
    public int iImage;
    public IntPtr lParam;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure NMHDR
    Public hwndFrom As IntPtr
    Public idFrom As UIntPtr
    Public code As UInteger
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure NMHDDISPINFOW
    Public hdr As NMHDR
    Public iItem As Integer
    Public mask As UInteger
    Public pszText As IntPtr
    Public cchTextMax As Integer
    Public iImage As Integer
    Public lParam As IntPtr
End Structure

import ctypes
from ctypes import wintypes

class NMHDR(ctypes.Structure):
    _fields_ = [
        ("hwndFrom", ctypes.c_void_p),
        ("idFrom", ctypes.c_size_t),
        ("code", wintypes.DWORD),
    ]

class NMHDDISPINFOW(ctypes.Structure):
    _fields_ = [
        ("hdr", NMHDR),
        ("iItem", ctypes.c_int),
        ("mask", wintypes.DWORD),
        ("pszText", ctypes.c_void_p),
        ("cchTextMax", ctypes.c_int),
        ("iImage", ctypes.c_int),
        ("lParam", ctypes.c_ssize_t),
    ]

#[repr(C)]
pub struct NMHDR {
    pub hwndFrom: *mut core::ffi::c_void,
    pub idFrom: usize,
    pub code: u32,
}

#[repr(C)]
pub struct NMHDDISPINFOW {
    pub hdr: NMHDR,
    pub iItem: i32,
    pub mask: u32,
    pub pszText: *mut core::ffi::c_void,
    pub cchTextMax: i32,
    pub iImage: i32,
    pub lParam: isize,
}

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

type NMHDR struct {
	hwndFrom uintptr
	idFrom uintptr
	code uint32
}

type NMHDDISPINFOW struct {
	hdr NMHDR
	iItem int32
	mask uint32
	pszText uintptr
	cchTextMax int32
	iImage int32
	lParam uintptr
}

type
  NMHDR = record
    hwndFrom: Pointer;
    idFrom: NativeUInt;
    code: DWORD;
  end;

  NMHDDISPINFOW = record
    hdr: NMHDR;
    iItem: Integer;
    mask: DWORD;
    pszText: Pointer;
    cchTextMax: Integer;
    iImage: Integer;
    lParam: NativeInt;
  end;

const NMHDR = extern struct {
    hwndFrom: ?*anyopaque,
    idFrom: usize,
    code: u32,
};

const NMHDDISPINFOW = extern struct {
    hdr: NMHDR,
    iItem: i32,
    mask: u32,
    pszText: ?*anyopaque,
    cchTextMax: i32,
    iImage: i32,
    lParam: isize,
};

type
  NMHDR {.bycopy.} = object
    hwndFrom: pointer
    idFrom: uint
    code: uint32

  NMHDDISPINFOW {.bycopy.} = object
    hdr: NMHDR
    iItem: int32
    mask: uint32
    pszText: pointer
    cchTextMax: int32
    iImage: int32
    lParam: int

struct NMHDR
{
    void* hwndFrom;
    size_t idFrom;
    uint code;
}

struct NMHDDISPINFOW
{
    NMHDR hdr;
    int iItem;
    uint mask;
    void* pszText;
    int cchTextMax;
    int iImage;
    ptrdiff_t lParam;
}