Can't get Window object for apps with more than one "main" window

Describe the bug For example, Google Chrome can have multiple open windows, but FlaUI only allows getting the automation controls for the “main” one, which is arbitrary. It’d be great if there was either a GetMainWindows method, or just a FromHandle method like AutomationElement has.

Code snippets

var app = FlaUI.Core.Application.Attach("chrome.exe");
    using (var automation = new UIA3Automation())
    {
        var window = app.GetMainWindow(automation);

Currently, I can’t use the library, I instead have to enumerate the windows manually (I use the https://github.com/zastrowm/Win32Interop.WinHandles library for this), and use the built-in .NET automation library:

foreach (var window in EnumerateWindows(chromeProcess))
{
    AutomationElement root = AutomationElement.FromHandle(window);
    ...
}

static IEnumerable<IntPtr> EnumerateWindows(Process process)
{
    return TopLevelWindowUtils.FindWindows(w => w.IsVisible())
        .Where(w =>
        {
            PInvoke.GetWindowThreadProcessId(w.RawPtr, out uint processId);
            return processId == process.Id;
        })
        .Select(w => w.RawPtr);
}

[ebram-h]

One thing to consider with GetAllTopLevelWindows is that it returns only top-level windows, like the main window, not its child windows. To get the windows that are opened by the main window try:

mainWindow.FindAllChildren(w => w.ByControlType(FlaUI.Core.Definitions.ControlType.Window));

[palenshus]

I get different results with that. I tried it using Chrome with two windows open:

using var app = FlaUI.Core.Application.Attach("chrome.exe");

using var automation = new UIA3Automation();

var topLevelWindows = app.GetAllTopLevelWindows(automation);
topLevelWindows.Count().Dump();    // returns 0

var visibleWindows = automation.GetDesktop().FindAllChildren(e => e.ByProcessId(app.ProcessId));
visibleWindows.Count().Dump();    // returns 2