Use PowerShell with FlaUI to find and interact with UI elements of a native Windows desktop app

Steps

1. Get FlaUI.Core plus either FlaUI.UIA3 (COM-based, best for WPF/Store apps) or FlaUI.UIA2 (managed-only, sometimes better for WinForms) via NuGet, then load the assemblies in the PowerShell session
2. Launch or attach to the target app with FlaUI.Core.Application.Launch("app.exe")
3. Create an automation object, e.g. New-Object FlaUI.UIA3.UIA3Automation, then get the main window with $app.GetMainWindow($automation)
4. Find an element with FindFirstDescendant using a condition factory, e.g. cf => cf.ByText("1"), and cast it with a helper like .AsButton()
5. Interact with it, e.g. call .Invoke() on the button wrapper, then read other elements' state back