To interact with UI items, WinAutomation must first identify them. To do so without resorting to image recognition or on-screen positions, WinAutomation uses UI controls to identify windows and their elements.
When creating a process, you can add a control by selecting the Add Control button in the Controls Repository, as shown in the following screenshot.
Alternatively, when you are configuring a UI/Windows action, select the Select Control from Repository option and then select the Add Control button.
To capture a control, highlight it and then select Ctrl + left-click.