OPTCOMBO

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct OPTCOMBO
{
    public ushort cbSize;
    public byte Flags;
    public ushort cListItem;
    public IntPtr pListItem;
    public int Sel;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)] public uint[] dwReserved;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure OPTCOMBO
    Public cbSize As UShort
    Public Flags As Byte
    Public cListItem As UShort
    Public pListItem As IntPtr
    Public Sel As Integer
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=3)> Public dwReserved() As UInteger
End Structure

import ctypes
from ctypes import wintypes

class OPTCOMBO(ctypes.Structure):
    _fields_ = [
        ("cbSize", ctypes.c_ushort),
        ("Flags", ctypes.c_ubyte),
        ("cListItem", ctypes.c_ushort),
        ("pListItem", ctypes.c_void_p),
        ("Sel", ctypes.c_int),
        ("dwReserved", wintypes.DWORD * 3),
    ]

#[repr(C)]
pub struct OPTCOMBO {
    pub cbSize: u16,
    pub Flags: u8,
    pub cListItem: u16,
    pub pListItem: *mut core::ffi::c_void,
    pub Sel: i32,
    pub dwReserved: [u32; 3],
}

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

type OPTCOMBO struct {
	cbSize uint16
	Flags byte
	cListItem uint16
	pListItem uintptr
	Sel int32
	dwReserved [3]uint32
}

type
  OPTCOMBO = record
    cbSize: Word;
    Flags: Byte;
    cListItem: Word;
    pListItem: Pointer;
    Sel: Integer;
    dwReserved: array[0..2] of DWORD;
  end;

const OPTCOMBO = extern struct {
    cbSize: u16,
    Flags: u8,
    cListItem: u16,
    pListItem: ?*anyopaque,
    Sel: i32,
    dwReserved: [3]u32,
};

type
  OPTCOMBO {.bycopy.} = object
    cbSize: uint16
    Flags: uint8
    cListItem: uint16
    pListItem: pointer
    Sel: int32
    dwReserved: array[3, uint32]

struct OPTCOMBO
{
    ushort cbSize;
    ubyte Flags;
    ushort cListItem;
    void* pListItem;
    int Sel;
    uint[3] dwReserved;
}