NOTIFYICONDATAW

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
public struct NOTIFYICONDATAW
{
    public uint cbSize;
    public IntPtr hWnd;
    public uint uID;
    public uint uFlags;
    public uint uCallbackMessage;
    public IntPtr hIcon;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)] public string szTip;
    public uint dwState;
    public uint dwStateMask;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)] public string szInfo;
    public _Anonymous_e__Union Anonymous;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)] public string szInfoTitle;
    public uint dwInfoFlags;
    public Guid guidItem;
    public IntPtr hBalloonIcon;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, Pack:=1, CharSet:=CharSet.Unicode)>
Public Structure NOTIFYICONDATAW
    Public cbSize As UInteger
    Public hWnd As IntPtr
    Public uID As UInteger
    Public uFlags As UInteger
    Public uCallbackMessage As UInteger
    Public hIcon As IntPtr
    <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=128)> Public szTip As String
    Public dwState As UInteger
    Public dwStateMask As UInteger
    <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=256)> Public szInfo As String
    Public Anonymous As _Anonymous_e__Union
    <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=64)> Public szInfoTitle As String
    Public dwInfoFlags As UInteger
    Public guidItem As Guid
    Public hBalloonIcon As IntPtr
End Structure

import ctypes
from ctypes import wintypes

class NOTIFYICONDATAW(ctypes.Structure):
    _pack_ = 1
    _fields_ = [
        ("cbSize", wintypes.DWORD),
        ("hWnd", ctypes.c_void_p),
        ("uID", wintypes.DWORD),
        ("uFlags", wintypes.DWORD),
        ("uCallbackMessage", wintypes.DWORD),
        ("hIcon", ctypes.c_void_p),
        ("szTip", ctypes.c_wchar * 128),
        ("dwState", wintypes.DWORD),
        ("dwStateMask", wintypes.DWORD),
        ("szInfo", ctypes.c_wchar * 256),
        ("Anonymous", _Anonymous_e__Union),
        ("szInfoTitle", ctypes.c_wchar * 64),
        ("dwInfoFlags", wintypes.DWORD),
        ("guidItem", GUID),
        ("hBalloonIcon", ctypes.c_void_p),
    ]

#[repr(C, packed(1))]
pub struct NOTIFYICONDATAW {
    pub cbSize: u32,
    pub hWnd: *mut core::ffi::c_void,
    pub uID: u32,
    pub uFlags: u32,
    pub uCallbackMessage: u32,
    pub hIcon: *mut core::ffi::c_void,
    pub szTip: [u16; 128],
    pub dwState: u32,
    pub dwStateMask: u32,
    pub szInfo: [u16; 256],
    pub Anonymous: _Anonymous_e__Union,
    pub szInfoTitle: [u16; 64],
    pub dwInfoFlags: u32,
    pub guidItem: GUID,
    pub hBalloonIcon: *mut core::ffi::c_void,
}

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

type NOTIFYICONDATAW struct {
	cbSize uint32
	hWnd uintptr
	uID uint32
	uFlags uint32
	uCallbackMessage uint32
	hIcon uintptr
	szTip [128]uint16
	dwState uint32
	dwStateMask uint32
	szInfo [256]uint16
	Anonymous _Anonymous_e__Union
	szInfoTitle [64]uint16
	dwInfoFlags uint32
	guidItem windows.GUID
	hBalloonIcon uintptr
}

type
  NOTIFYICONDATAW = packed record
    cbSize: DWORD;
    hWnd: Pointer;
    uID: DWORD;
    uFlags: DWORD;
    uCallbackMessage: DWORD;
    hIcon: Pointer;
    szTip: array[0..127] of WideChar;
    dwState: DWORD;
    dwStateMask: DWORD;
    szInfo: array[0..255] of WideChar;
    Anonymous: _Anonymous_e__Union;
    szInfoTitle: array[0..63] of WideChar;
    dwInfoFlags: DWORD;
    guidItem: TGUID;
    hBalloonIcon: Pointer;
  end;

const NOTIFYICONDATAW = extern struct {
    cbSize: u32,
    hWnd: ?*anyopaque,
    uID: u32,
    uFlags: u32,
    uCallbackMessage: u32,
    hIcon: ?*anyopaque,
    szTip: [128]u16,
    dwState: u32,
    dwStateMask: u32,
    szInfo: [256]u16,
    Anonymous: _Anonymous_e__Union,
    szInfoTitle: [64]u16,
    dwInfoFlags: u32,
    guidItem: GUID,
    hBalloonIcon: ?*anyopaque,
};

type
  NOTIFYICONDATAW {.packed.} = object
    cbSize: uint32
    hWnd: pointer
    uID: uint32
    uFlags: uint32
    uCallbackMessage: uint32
    hIcon: pointer
    szTip: array[128, uint16]
    dwState: uint32
    dwStateMask: uint32
    szInfo: array[256, uint16]
    Anonymous: _Anonymous_e__Union
    szInfoTitle: array[64, uint16]
    dwInfoFlags: uint32
    guidItem: GUID
    hBalloonIcon: pointer

align(1)
struct NOTIFYICONDATAW
{
    uint cbSize;
    void* hWnd;
    uint uID;
    uint uFlags;
    uint uCallbackMessage;
    void* hIcon;
    wchar[128] szTip;
    uint dwState;
    uint dwStateMask;
    wchar[256] szInfo;
    _Anonymous_e__Union Anonymous;
    wchar[64] szInfoTitle;
    uint dwInfoFlags;
    GUID guidItem;
    void* hBalloonIcon;
}