NMCUSTOMDRAW

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 RECT
{
    public int left;
    public int top;
    public int right;
    public int bottom;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct NMCUSTOMDRAW
{
    public NMHDR hdr;
    public uint dwDrawStage;
    public IntPtr hdc;
    public RECT rc;
    public UIntPtr dwItemSpec;
    public uint uItemState;
    public IntPtr lItemlParam;
}

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 RECT
    Public left As Integer
    Public top As Integer
    Public right As Integer
    Public bottom As Integer
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure NMCUSTOMDRAW
    Public hdr As NMHDR
    Public dwDrawStage As UInteger
    Public hdc As IntPtr
    Public rc As RECT
    Public dwItemSpec As UIntPtr
    Public uItemState As UInteger
    Public lItemlParam 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 RECT(ctypes.Structure):
    _fields_ = [
        ("left", ctypes.c_int),
        ("top", ctypes.c_int),
        ("right", ctypes.c_int),
        ("bottom", ctypes.c_int),
    ]

class NMCUSTOMDRAW(ctypes.Structure):
    _fields_ = [
        ("hdr", NMHDR),
        ("dwDrawStage", wintypes.DWORD),
        ("hdc", ctypes.c_void_p),
        ("rc", RECT),
        ("dwItemSpec", ctypes.c_size_t),
        ("uItemState", wintypes.DWORD),
        ("lItemlParam", 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 RECT {
    pub left: i32,
    pub top: i32,
    pub right: i32,
    pub bottom: i32,
}

#[repr(C)]
pub struct NMCUSTOMDRAW {
    pub hdr: NMHDR,
    pub dwDrawStage: u32,
    pub hdc: *mut core::ffi::c_void,
    pub rc: RECT,
    pub dwItemSpec: usize,
    pub uItemState: u32,
    pub lItemlParam: isize,
}

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

type NMHDR struct {
	hwndFrom uintptr
	idFrom uintptr
	code uint32
}

type RECT struct {
	left int32
	top int32
	right int32
	bottom int32
}

type NMCUSTOMDRAW struct {
	hdr NMHDR
	dwDrawStage uint32
	hdc uintptr
	rc RECT
	dwItemSpec uintptr
	uItemState uint32
	lItemlParam uintptr
}

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

  RECT = record
    left: Integer;
    top: Integer;
    right: Integer;
    bottom: Integer;
  end;

  NMCUSTOMDRAW = record
    hdr: NMHDR;
    dwDrawStage: DWORD;
    hdc: Pointer;
    rc: RECT;
    dwItemSpec: NativeUInt;
    uItemState: DWORD;
    lItemlParam: NativeInt;
  end;

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

const RECT = extern struct {
    left: i32,
    top: i32,
    right: i32,
    bottom: i32,
};

const NMCUSTOMDRAW = extern struct {
    hdr: NMHDR,
    dwDrawStage: u32,
    hdc: ?*anyopaque,
    rc: RECT,
    dwItemSpec: usize,
    uItemState: u32,
    lItemlParam: isize,
};

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

  RECT {.bycopy.} = object
    left: int32
    top: int32
    right: int32
    bottom: int32

  NMCUSTOMDRAW {.bycopy.} = object
    hdr: NMHDR
    dwDrawStage: uint32
    hdc: pointer
    rc: RECT
    dwItemSpec: uint
    uItemState: uint32
    lItemlParam: int

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

struct RECT
{
    int left;
    int top;
    int right;
    int bottom;
}

struct NMCUSTOMDRAW
{
    NMHDR hdr;
    uint dwDrawStage;
    void* hdc;
    RECT rc;
    size_t dwItemSpec;
    uint uItemState;
    ptrdiff_t lItemlParam;
}