wpf-notifyicon/Source/NotifyIconWpf/Interop/WindowClass.cs

using System;
using System.Runtime.InteropServices;

namespace Hardcodet.Wpf.TaskbarNotification.Interop
{
  /// <summary>
  /// Callback delegate which is used by the Windows API to
  /// submit window messages.
  /// </summary>
  public delegate IntPtr WindowProcedureHandler(IntPtr hwnd, uint uMsg, IntPtr wparam, IntPtr lparam);


  /// <summary>
  /// Win API WNDCLASS struct - represents a single window.
  /// Used to receive window messages.
  /// </summary>
  [StructLayout(LayoutKind.Sequential)]
  public struct WindowClass
  {
    public uint style;
    public WindowProcedureHandler lpfnWndProc;
    public int cbClsExtra;
    public int cbWndExtra;
    public IntPtr hInstance;
    public IntPtr hIcon;
    public IntPtr hCursor;
    public IntPtr hbrBackground;
    [MarshalAs(UnmanagedType.LPWStr)] public string lpszMenuName;
    [MarshalAs(UnmanagedType.LPWStr)] public string lpszClassName;
  }
}