Roman

Are there any items in `comboBoxItems`? Did you maybe switch from UIA2 to UIA3 or the other way?

I suspect you mean hiding by modifying the windows style. This is not the idea of UI Automation (that would be, to click a button or select a checkbox to...

FlaUI up to 3.2.0 support .net 3.5 which should run on XP but as others mentioned, I am not sure what else you need installed in XP to get UIA...

FlaUI uses an own generated Interop.UIAutomationClient because some tweaks are needed for edge cases. The one FlaUI uses is also published on NuGet and open source and can be found...

If the control does not provide any UIA-Access, it gets a bit harder. First, check if you can enable UI-Automation in DevExpress itself. For WPF, there is a property `ClearAutomationEventsHelper.IsEnabled...

You should be able to just create your own class and derive it from `AutomationElement`, see for example the `Label`: https://github.com/FlaUI/FlaUI/blob/master/src/FlaUI.Core/AutomationElements/Label.cs

Can you try `DrawHighlight` on the Window to make sure, you are on the correct one? Installers tend to have a Splash-Screen which usually stays the `MainWindow` for this process...

That further shows that you are on the wrong Window. Try getting all Window Elements from the desktop where you pid matches and check if any of them is the...

Can you please measure each call individually (`app.GetAllTopLevelWindows`, `window.FindFirstDescendant`) to see which of those 2 is the slower one? If it indeed is the first one, you can always directly...

When it gets all windows from the top level (desktop), UIA queries the Windows-Objects underneath and it might encounter a window (application) that is hanging for some time until it...