param([Parameter(Mandatory = $true)][string]$StateFile)
$ErrorActionPreference = 'Stop'
Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing
Add-Type -ReferencedAssemblies System.Windows.Forms,System.Drawing,System.Web.Extensions @'
using System;
using System.IO;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Web.Script.Serialization;
using System.Windows.Forms;
using System.Drawing;
public sealed class ArtemisMenuFixture : Form {
    [DllImport("user32.dll")] static extern IntPtr CreatePopupMenu();
    [DllImport("user32.dll", CharSet=CharSet.Unicode)] static extern bool AppendMenuW(IntPtr menu, uint flags, UIntPtr id, string text);
    [DllImport("user32.dll")] static extern uint TrackPopupMenu(IntPtr menu, uint flags, int x, int y, int reserved, IntPtr owner, IntPtr rect);
    [DllImport("user32.dll")] static extern bool DestroyMenu(IntPtr menu);
    readonly string stateFile;
    int count, attempts;
    long result = -1;
    string error = "";
    public ArtemisMenuFixture(string path) {
        stateFile = path;
        Text = "ARTEMIS native menu fixture";
        Size = new Size(560, 360);
        StartPosition = FormStartPosition.CenterScreen;
        var button = new Button { Text="Open native menu", Location=new Point(30,30), Size=new Size(240,55) };
        button.Click += delegate {
            var menu = CreatePopupMenu();
            try {
                attempts++;
                Save();
                if (!AppendMenuW(menu, 0, new UIntPtr(1), "Increment once")) throw new Exception("AppendMenuW failed");
                result = TrackPopupMenu(menu, 0x100, Left+45, Top+140, 0, Handle, IntPtr.Zero);
                if (result == 1) count++;
            } catch (Exception ex) { error = ex.Message; }
            finally { DestroyMenu(menu); Save(); }
        };
        Controls.Add(button);
        Shown += delegate { Save(); };
    }
    void Save() {
        File.WriteAllText(stateFile, new JavaScriptSerializer().Serialize(new Dictionary<string,object> {
            {"pid",Process.GetCurrentProcess().Id}, {"hwnd",Handle.ToInt64()}, {"selected_count",count},
            {"menu_attempts",attempts}, {"menu_result",result}, {"menu_error",error}
        }));
    }
}
'@
[System.Windows.Forms.Application]::Run([ArtemisMenuFixture]::new($StateFile))