RDITEMHDR

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct RDITEMHDR
{
    public uint dwFlags;
    public IntPtr cookie;
    public IntPtr lpReserved;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure RDITEMHDR
    Public dwFlags As UInteger
    Public cookie As IntPtr
    Public lpReserved As IntPtr
End Structure

import ctypes
from ctypes import wintypes

class RDITEMHDR(ctypes.Structure):
    _fields_ = [
        ("dwFlags", wintypes.DWORD),
        ("cookie", ctypes.c_ssize_t),
        ("lpReserved", ctypes.c_ssize_t),
    ]

#[repr(C)]
pub struct RDITEMHDR {
    pub dwFlags: u32,
    pub cookie: isize,
    pub lpReserved: isize,
}

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

type RDITEMHDR struct {
	dwFlags uint32
	cookie uintptr
	lpReserved uintptr
}

type
  RDITEMHDR = record
    dwFlags: DWORD;
    cookie: NativeInt;
    lpReserved: NativeInt;
  end;

const RDITEMHDR = extern struct {
    dwFlags: u32,
    cookie: isize,
    lpReserved: isize,
};

type
  RDITEMHDR {.bycopy.} = object
    dwFlags: uint32
    cookie: int
    lpReserved: int

struct RDITEMHDR
{
    uint dwFlags;
    ptrdiff_t cookie;
    ptrdiff_t lpReserved;
}