OLEUICHANGEICONW

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct OLEUICHANGEICONW
{
    public uint cbStruct;
    public uint dwFlags;
    public IntPtr hWndOwner;
    public IntPtr lpszCaption;
    public IntPtr lpfnHook;
    public IntPtr lCustData;
    public IntPtr hInstance;
    public IntPtr lpszTemplate;
    public IntPtr hResource;
    public IntPtr hMetaPict;
    public Guid clsid;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)] public string szIconExe;
    public int cchIconExe;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure OLEUICHANGEICONW
    Public cbStruct As UInteger
    Public dwFlags As UInteger
    Public hWndOwner As IntPtr
    Public lpszCaption As IntPtr
    Public lpfnHook As IntPtr
    Public lCustData As IntPtr
    Public hInstance As IntPtr
    Public lpszTemplate As IntPtr
    Public hResource As IntPtr
    Public hMetaPict As IntPtr
    Public clsid As Guid
    <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=260)> Public szIconExe As String
    Public cchIconExe As Integer
End Structure

import ctypes
from ctypes import wintypes

class OLEUICHANGEICONW(ctypes.Structure):
    _fields_ = [
        ("cbStruct", wintypes.DWORD),
        ("dwFlags", wintypes.DWORD),
        ("hWndOwner", ctypes.c_void_p),
        ("lpszCaption", ctypes.c_void_p),
        ("lpfnHook", ctypes.c_void_p),
        ("lCustData", ctypes.c_ssize_t),
        ("hInstance", ctypes.c_void_p),
        ("lpszTemplate", ctypes.c_void_p),
        ("hResource", ctypes.c_void_p),
        ("hMetaPict", ctypes.c_void_p),
        ("clsid", GUID),
        ("szIconExe", ctypes.c_wchar * 260),
        ("cchIconExe", ctypes.c_int),
    ]

#[repr(C)]
pub struct OLEUICHANGEICONW {
    pub cbStruct: u32,
    pub dwFlags: u32,
    pub hWndOwner: *mut core::ffi::c_void,
    pub lpszCaption: *mut core::ffi::c_void,
    pub lpfnHook: *mut core::ffi::c_void,
    pub lCustData: isize,
    pub hInstance: *mut core::ffi::c_void,
    pub lpszTemplate: *mut core::ffi::c_void,
    pub hResource: *mut core::ffi::c_void,
    pub hMetaPict: *mut core::ffi::c_void,
    pub clsid: GUID,
    pub szIconExe: [u16; 260],
    pub cchIconExe: i32,
}

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

type OLEUICHANGEICONW struct {
	cbStruct uint32
	dwFlags uint32
	hWndOwner uintptr
	lpszCaption uintptr
	lpfnHook uintptr
	lCustData uintptr
	hInstance uintptr
	lpszTemplate uintptr
	hResource uintptr
	hMetaPict uintptr
	clsid windows.GUID
	szIconExe [260]uint16
	cchIconExe int32
}

type
  OLEUICHANGEICONW = record
    cbStruct: DWORD;
    dwFlags: DWORD;
    hWndOwner: Pointer;
    lpszCaption: Pointer;
    lpfnHook: Pointer;
    lCustData: NativeInt;
    hInstance: Pointer;
    lpszTemplate: Pointer;
    hResource: Pointer;
    hMetaPict: Pointer;
    clsid: TGUID;
    szIconExe: array[0..259] of WideChar;
    cchIconExe: Integer;
  end;

const OLEUICHANGEICONW = extern struct {
    cbStruct: u32,
    dwFlags: u32,
    hWndOwner: ?*anyopaque,
    lpszCaption: ?*anyopaque,
    lpfnHook: ?*anyopaque,
    lCustData: isize,
    hInstance: ?*anyopaque,
    lpszTemplate: ?*anyopaque,
    hResource: ?*anyopaque,
    hMetaPict: ?*anyopaque,
    clsid: GUID,
    szIconExe: [260]u16,
    cchIconExe: i32,
};

type
  OLEUICHANGEICONW {.bycopy.} = object
    cbStruct: uint32
    dwFlags: uint32
    hWndOwner: pointer
    lpszCaption: pointer
    lpfnHook: pointer
    lCustData: int
    hInstance: pointer
    lpszTemplate: pointer
    hResource: pointer
    hMetaPict: pointer
    clsid: GUID
    szIconExe: array[260, uint16]
    cchIconExe: int32

struct OLEUICHANGEICONW
{
    uint cbStruct;
    uint dwFlags;
    void* hWndOwner;
    void* lpszCaption;
    void* lpfnHook;
    ptrdiff_t lCustData;
    void* hInstance;
    void* lpszTemplate;
    void* hResource;
    void* hMetaPict;
    GUID clsid;
    wchar[260] szIconExe;
    int cchIconExe;
}