NMTVDISPINFOW

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 TVITEMW
{
    public uint mask;
    public IntPtr hItem;
    public uint state;
    public uint stateMask;
    public IntPtr pszText;
    public int cchTextMax;
    public int iImage;
    public int iSelectedImage;
    public int cChildren;
    public IntPtr lParam;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct NMTVDISPINFOW
{
    public NMHDR hdr;
    public TVITEMW item;
}

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 TVITEMW
    Public mask As UInteger
    Public hItem As IntPtr
    Public state As UInteger
    Public stateMask As UInteger
    Public pszText As IntPtr
    Public cchTextMax As Integer
    Public iImage As Integer
    Public iSelectedImage As Integer
    Public cChildren As Integer
    Public lParam As IntPtr
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure NMTVDISPINFOW
    Public hdr As NMHDR
    Public item As TVITEMW
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 TVITEMW(ctypes.Structure):
    _fields_ = [
        ("mask", wintypes.DWORD),
        ("hItem", ctypes.c_ssize_t),
        ("state", wintypes.DWORD),
        ("stateMask", wintypes.DWORD),
        ("pszText", ctypes.c_void_p),
        ("cchTextMax", ctypes.c_int),
        ("iImage", ctypes.c_int),
        ("iSelectedImage", ctypes.c_int),
        ("cChildren", ctypes.c_int),
        ("lParam", ctypes.c_ssize_t),
    ]

class NMTVDISPINFOW(ctypes.Structure):
    _fields_ = [
        ("hdr", NMHDR),
        ("item", TVITEMW),
    ]

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

#[repr(C)]
pub struct TVITEMW {
    pub mask: u32,
    pub hItem: isize,
    pub state: u32,
    pub stateMask: u32,
    pub pszText: *mut core::ffi::c_void,
    pub cchTextMax: i32,
    pub iImage: i32,
    pub iSelectedImage: i32,
    pub cChildren: i32,
    pub lParam: isize,
}

#[repr(C)]
pub struct NMTVDISPINFOW {
    pub hdr: NMHDR,
    pub item: TVITEMW,
}

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

type NMHDR struct {
	hwndFrom uintptr
	idFrom uintptr
	code uint32
}

type TVITEMW struct {
	mask uint32
	hItem uintptr
	state uint32
	stateMask uint32
	pszText uintptr
	cchTextMax int32
	iImage int32
	iSelectedImage int32
	cChildren int32
	lParam uintptr
}

type NMTVDISPINFOW struct {
	hdr NMHDR
	item TVITEMW
}

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

  TVITEMW = record
    mask: DWORD;
    hItem: NativeInt;
    state: DWORD;
    stateMask: DWORD;
    pszText: Pointer;
    cchTextMax: Integer;
    iImage: Integer;
    iSelectedImage: Integer;
    cChildren: Integer;
    lParam: NativeInt;
  end;

  NMTVDISPINFOW = record
    hdr: NMHDR;
    item: TVITEMW;
  end;

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

const TVITEMW = extern struct {
    mask: u32,
    hItem: isize,
    state: u32,
    stateMask: u32,
    pszText: ?*anyopaque,
    cchTextMax: i32,
    iImage: i32,
    iSelectedImage: i32,
    cChildren: i32,
    lParam: isize,
};

const NMTVDISPINFOW = extern struct {
    hdr: NMHDR,
    item: TVITEMW,
};

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

  TVITEMW {.bycopy.} = object
    mask: uint32
    hItem: int
    state: uint32
    stateMask: uint32
    pszText: pointer
    cchTextMax: int32
    iImage: int32
    iSelectedImage: int32
    cChildren: int32
    lParam: int

  NMTVDISPINFOW {.bycopy.} = object
    hdr: NMHDR
    item: TVITEMW

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

struct TVITEMW
{
    uint mask;
    ptrdiff_t hItem;
    uint state;
    uint stateMask;
    void* pszText;
    int cchTextMax;
    int iImage;
    int iSelectedImage;
    int cChildren;
    ptrdiff_t lParam;
}

struct NMTVDISPINFOW
{
    NMHDR hdr;
    TVITEMW item;
}